UNNMIIY 4 in 1 Adjustable Dumbbells Set

The 5-in-1 claim is the main reason buyers consider this set — and the main reason they hesitate. "Five configurations" sounds like marketing until you understand what each one physically is, what exercises it enables, and where it runs into real limits. Here's an honest breakdown.

Dumbbell Pair

This is the default configuration: two independent handles, each loaded with plates and secured by the double-nut collars. Use them for anything you'd do with fixed-weight dumbbells — bicep curls, lateral raises, dumbbell rows, chest press on a bench, Romanian deadlifts, overhead press. The 90 lb set gives you 45 lbs per hand, which covers the full range of dumbbell exercises for most intermediate home gym users. Adjusting weight means unscrewing the outer collar, sliding plates on or off, and retightening — about 15 to 20 seconds per change.

The honest limitation: that adjustment time matters if you're doing supersets with no rest between exercises. Straight sets with normal rest periods? Barely noticeable.

Barbell Mode

The connector rod links the two handles end-to-end, creating a single loaded barbell. The 5 mm steel tube core handles the structural load; the 20 mm foam wrapping sits across the back of your neck for squats or along your hands for bent-over rows. At 90 lbs total, you're working with a functional barbell for goblet squats, Romanian deadlifts, bent-over rows, and shoulder presses in a small space.

What it isn't: a 7-foot Olympic bar. The short length and plate geometry don't suit flat bench press with a full range of motion, and you won't be loading it to 200 lbs. For the compound barbell movements that work in an 8-foot living room, it does the job.

Two-Hand Kettlebell Grip

Hold one dumbbell handle horizontally with both hands — plates hanging below, grip centered. This creates a goblet squat implement, a two-hand swing weight, or a Romanian deadlift grip that mimics a kettlebell without buying a separate one. Goblet squats, two-hand swings, and sumo deadlifts all work cleanly in this configuration.

The limit here is size. The assembled dumbbell is bulkier than a cast-iron bell, especially at higher weights. Slow, controlled movements work well. Fast, ballistic swings with aggressive hip drive — the kind a 35 lb cast-iron bell handles with ease — feel awkward at higher weights because the plate geometry shifts the center of mass differently than a round bell.

Single-Hand Kettlebell Grip

Hold one handle by the end with the plates hanging below, using a neutral grip. This position suits single-arm swings, single-arm rows from the floor, and suitcase carries. It's not identical to a proper kettlebell handle shape — the ABS bar is straight, not curved — but for users who want kettlebell-style loading without a dedicated purchase, it covers the basics.

Best for: goblet variations, carries, and controlled single-arm work. Less suited to Turkish get-ups or cleans where a true kettlebell bell shape stabilizes the wrist naturally.

Push-Up Stand

Place both handles on the floor parallel to each other and grip them during push-ups. This reduces wrist extension compared to flat-palmed push-ups — a real benefit for anyone with wrist discomfort or limited wrist mobility. The ABS non-slip texture grips the floor reasonably well on carpet; on polished hardwood, putting a mat underneath is worth doing.

This is a straightforward, useful configuration. It's not a specialty item — it just works, and it's one less accessory to buy if wrist-friendly push-up grips were already on your list.

The five weight options aren't just "small, medium, large." Each one represents a different ceiling for specific movements — and picking the wrong size means either buying more weight in six months or paying for capacity you won't use for years. Here's how to match each configuration to where you actually are in training.

20 lbs Total (10 lbs per hand)

This is the entry point: 10 lbs per hand as dumbbells, 20 lbs as a combined barbell. It suits rehab work, mobility-focused training, older adults building a baseline, or very early beginners starting with lighter isolation exercises — lateral raises, light curls, shoulder work with no prior training history. Most people doing any kind of structured strength program will outgrow this within a few months. Buy the 20 lb set if physical limitation, rehabilitation context, or extremely limited budget makes the smaller option the right starting point — not simply because you're "a beginner."

30 lbs Total (15 lbs per hand)

At 15 lbs per hand, this covers early beginner upper-body work — light curls, overhead press starting out, lateral raises, light rows. The 30 lbs combined in barbell mode is usable for goblet squats and Romanian deadlifts at a beginner level. The ceiling comes quickly for lower-body movements; you'll max out on goblet squats before you max out on curls. A good choice for someone building an initial routine around upper-body isolation work, or supplementing a cardio-heavy program with light resistance.

45 lbs Total (22.5 lbs per hand)

This is the sweet spot for most beginners and early intermediates. At 22.5 lbs per hand, you have room to progress through most beginner dumbbell programs — curls, rows, presses, lateral raises — before hitting the ceiling. The 45 lb barbell mode handles goblet squats and Romanian deadlifts for a couple of training stages. Most people starting a structured 3-day-per-week home strength program won't hit the wall on this set for the first year of consistent training.

70 lbs Total (35 lbs per hand)

At 35 lbs per hand, this covers solid intermediate dumbbell work across most movement patterns. Rows, chest press, and overhead press at 35 lbs are genuinely challenging for most people with one to two years of training. Goblet squats and single-leg work at this range are demanding enough to drive real lower-body development. The 70 lb barbell configuration handles bent-over rows and Romanian deadlifts at a level that produces results. If you've been training consistently for a year and know you're not a beginner, this is the configuration to default to.

90 lbs Total (45 lbs per hand)

The top configuration: 45 lbs per hand as dumbbells, 90 lbs as a combined barbell. This handles dumbbell rows, chest press, incline press, and Romanian deadlifts at weights that challenge most intermediate lifters for several years of training. The honest ceiling: if you're already pressing 50 lb dumbbells at the gym, this set won't challenge your chest — but it fully covers shoulder, back, and arm training. For someone building a home gym who wants to avoid buying a second set within two or three years, this is the configuration worth the additional spend.

One practical note that applies to all five: weight adjustment on this set takes 15 to 20 seconds per change — plates off, plates on, collar retightened. That's a real number, not an estimate. Build it into how you structure your workouts. Straight sets with 60 to 90 seconds of rest? No issue. Back-to-back supersets with zero transition time? Plan your exercise pairings so the adjustment happens during normal rest rather than against a ticking clock.

The 5-in-1 claim is either this product's best feature or its biggest skepticism trigger, depending on who you ask. A YouTube reviewer built an entire short-form review around the question: does the multi-mode system actually hold up in practice? The answer is yes — with honest caveats per mode. Here's exactly what each configuration enables and where it runs into real-world limits.

Dumbbell Pair

This is the primary configuration and the one you'll use most often. Each handle loads with individual plates and locks with the double-nut collar system. You get two independent weights — one per hand — for the full library of dumbbell exercises: bicep curls, lateral raises, overhead presses, dumbbell rows, chest flyes, lunges, Romanian deadlifts.

Honest limit: adjusting between exercises requires removing plates and retightening collars. Budget 15–20 seconds per change. For straight sets, that's a non-issue. For fast supersets, plan your exercise pairings around it.

Barbell Mode

The connector rod — a 5 mm steel tube wrapped in 20 mm foam padding — links both dumbbell handles into a single short barbell. The curved design fits across the neck for squats and distributes load across the upper back for pressing. Exercises that work well: bent-over rows, goblet squats, Romanian deadlifts, upright rows, shoulder presses.

Honest limit: this is a short barbell, not a 7-foot Olympic bar. You won't be bench-pressing with a full range of motion or loading it for heavy back squats. For compact compound movements in a small space, it does real work. For powerlifting-style loading, it isn't the right tool.

Two-Hand Kettlebell Grip

Hold one dumbbell handle horizontally with both hands — plates hanging below, handle gripped at the top. This creates a serviceable kettlebell position for goblet squats, two-arm swings with controlled tempo, and carry variations. The grip is stable and the weight distribution is predictable.

Honest limit: the assembled shape is wider than a cast-iron kettlebell. For slow, strength-focused goblet work, it's fine. For explosive ballistic movements — fast snatches, high-rep American swings — the bulk becomes noticeable and limits range of motion. If kettlebell ballistics are a significant part of your programming, a standalone bell works better for those specific drills.

Single-Hand Kettlebell Grip

One handle, held so the plates hang vertically below the grip. Useful for single-arm swings, single-arm carries, and one-arm rows where the off-center load increases demand on stabilizer muscles. The ABS non-slip texture on the bar surface helps here — the grip stays secure even under single-arm loading.

Honest limit: same shape caveat as two-hand mode. It works for strength-based single-arm movements. Fast unilateral ballistics aren't where this configuration shines.

Push-Up Stand

Place both handles on the floor, parallel to each other, grips facing inward. This raises your hands off the floor and reduces the wrist extension angle required for standard push-ups — useful for anyone with wrist sensitivity, prior wrist injuries, or simply more comfortable with a neutral grip position during pressing. It also allows a deeper range of motion than flat-palmed push-ups on hard floor.

Honest limit: the handles need to be stable on your floor surface. On carpet, they sit firmly. On smooth tile, verify they're not sliding before loading your full bodyweight. This isn't a product deficiency — it's the same consideration you'd have with any dumbbell used as a push-up grip.

Five weight configurations is a selling point — and a decision you actually have to make. The right choice depends on what you're currently lifting, what movements you're programming, and how much room you want to leave for progression. Here's a direct guide mapped to each option.

20 lbs Total (10 lbs per hand)

Best for: rehab and recovery work, older adults building baseline strength, very early beginners who haven't established consistent form yet, mobility and low-load resistance circuits.

At 10 lbs per hand, you're working in a range appropriate for lighter isolation movements — shoulder raises, light curls, controlled core work. Most people starting a first home gym program will outgrow this set within 3–4 months of consistent training. It's the right choice if light load is a medical or therapeutic requirement, not just a preference.

30 lbs Total (15 lbs per hand)

Best for: beginners in their first 2–3 months of training, lighter upper-body isolation work, users whose primary goal is muscle endurance rather than strength, and anyone combining the set primarily with bodyweight programming.

At 15 lbs per hand, you can run a complete beginner program for the upper body. Lower-body movements (squats, Romanian deadlifts) will feel light quickly. If you're combining this set with bodyweight training and your primary goal is conditioning or toning rather than progressive overload, the 30 lb set covers that range well.

45 lbs Total (22.5 lbs per hand)

Best for: beginners through early intermediates, users following structured programs like a full-body 3-day split, and anyone whose dumbbell pressing hasn't reached 20 lbs per hand yet.

This is the most common entry point for new home gym builders. The 22.5 lb per hand ceiling covers most beginner pressing and row work through the first 6–12 months of training. Where it tops out: goblet squats and Romanian deadlifts tend to progress faster than upper-body pressing — you may find your legs outgrow this set before your shoulders do.

70 lbs Total (35 lbs per hand)

Best for: intermediate lifters who've been training consistently for 1–2 years, users following programs that include dumbbell compound movements, and anyone who wants barbell-mode capability for real loading on bent-over rows and squats.

At 35 lbs per hand, you're in the range where dumbbell bench pressing, rows, and Romanian deadlifts all feel like real training loads. The 70 lb set handles most compound dumbbell movements at intermediate intensity. In barbell mode, 70 lbs total gives you a functional load for bent-over rows and goblet squats without feeling like a warmup.

90 lbs Total (45 lbs per hand)

Best for: intermediate to advanced home gym users, lifters with 2+ years of consistent training, anyone who wants the full range of compound dumbbell movements covered without hitting a ceiling mid-program.

Honestly, 45 lbs per hand covers the majority of what most home gym lifters ever need from dumbbells. Dumbbell bench press, rows, Romanian deadlifts, lunges, and overhead pressing all live comfortably within that range for most non-competitive lifters. The one caveat: if you're already pressing the 40s at a commercial gym and want room to grow, the 90 lb set gives you that space. If you're already working at 45 lbs per hand and need more, this product isn't the right fit — and it's worth knowing that before you order.