Adjustable dumbbells: mechanisms, increments and packages
Understand what changes between loadable handles, selector pins and rotating-handle dumbbells, and how to read a pair’s weight range.
An adjustable dumbbell changes resistance by attaching a different quantity of weight to one handle. Compare the useful range per hand, the smallest selectable step and the method of changing plates. Then check exactly what the Australian package includes.
A rotating-handle pair with 20 settings from 4 to 32.5 kg per hand. The 1.5 kg steps give more room to progress smaller lifts than a 2.5 kg jump.
Photo: 360 Strength / Little Bloke Fitness.Three ways to change the weight
Plate-loaded handles use loose discs secured by collars or a purpose-made lock. A selector design leaves unused weights in a tray or nested stack. Both replace several fixed weights, but their daily handling is different: one asks you to move plates; the other asks you to return the handle to its selection position.
A “quick change” claim is not a common speed test. Consider a whole training sequence: taking the weight off the stand, adjusting both hands, doing the set and returning them. A small convenience repeated through every workout may matter more than the heaviest setting.
| Type | How selection works | What to inspect |
|---|---|---|
| Loose plates and locks | Add or remove matching plates | Lock engagement, plate diameter and remaining sleeve space |
| Nested weights with selector pins | A pin links the handle to selected weights | Correct pin location, clearance around the hand and model compatibility |
| Rotating handle or dial | Select a marked setting while docked | Full seating in the base and positive engagement at every setting |
Sources: Little Bloke Fitness: 32.5 kg adjustable pair · Ironmaster: Quick-Lock 75 lb package · PowerBlock: product questions
The small end of the range matters
Write down the lightest and heaviest weight you use for each exercise. A pair that covers rows but starts too heavy for lateral raises will still need a lighter companion. Large jumps can also become the limiting feature: moving from 10 to 12.5 kg is a 25% increase, whereas moving from 30 to 32.5 kg is about 8%. These are arithmetic comparisons, not predictions of progress.
Some systems split adjustments into a main step and smaller add-on weights. Check whether the small step is available everywhere in the range. The 360 Strength 32.5 kg pair, for example, lists 1.5 kg steps; that is a different buying proposition from choosing solely by its maximum.
Sources: Little Bloke Fitness: 32.5 kg adjustable pair · PowerBlock: product questions
Read the package as an inventory
A “50 kg set” might mean two 25 kg dumbbells, a single 50 kg dumbbell or the total mass of handles and loose plates. Look for an explicit per-hand range. For a loadable pair, divide the usable plates between both handles and both ends; having enough total iron does not guarantee a balanced configuration fits.
Record the bases, locks, stand and expansion plates separately. Ironmaster’s original 75 lb package distinguishes bare handles from handles with locking screws, illustrating why a headline minimum can mislead. Treat a future expansion limit as a separate purchase until its required kit is identified.
Sources: Ironmaster: Quick-Lock 75 lb package
Ownership after the first month
Ask the Australian seller about replacement selectors, bases, locks and individual plates. A familiar brand name does not make parts interchangeable between generations. For a second-hand set, identify both the handle and the surrounding weight stack before buying an expansion.
Follow the specific maker’s drop policy. PowerBlock states that its dumbbells are not warranted for drops; that cannot be generalised to every adjustable design. For ordinary home use, the practical habit is to clear a return position beside the bench and finish each set under control. Allow space around the dock as well as around the dumbbell in your hand.
Sources: PowerBlock: product questions · PowerBlock: warranty questions and parts
Models mentioned in this article
360 Strength Steel Adjustable Dumbbells — 32.5 kg pair
Choose it when quick changes and smaller increments matter more than loading beyond 32.5 kg. Both selection bases are included.
Specifications & buying options
LSG V1 24 kg pair with stand
The lower-cost pair-and-stand option for exercises that fit LSG’s use restrictions. Buy it expecting to stay within 24 kg per hand.
Specifications & buying options
Ironmaster Quick-Lock 75 lb pair — no stand
Straight sets with time to reload suit the manual design. The 75 lb range is useful immediately, with 120 and 165 lb kits available when heavier work justifies them.
Specifications & buying options
PowerBlock Elite EXP — Stage 1 pair
My default adjustable pair for a home gym: quick main weight changes, with matching expansion stages available when you need heavier loads.
Specifications & buying options
VULCAN Adjustable Dumbbells — advertised 36 kg per hand
A useful format if you prefer handling steel plates and want compatible kettlebell or straight-bar handles later. Allow a place beside the bench to lay out plates during changes.
Specifications & buying optionsSources & further reading
Checked 17 Oct 2026. The links below identify the sources used for this article.