Product image of a set of all-black StairMaster TwistLock adjustable dumbbells

An Extremely Detailed, Honest StairMaster TwistLock Review

Considering their specialization in cardio equipment, you’d probably never guess that StairMaster also makes a pair of adjustable dumbbells. Well, they do. While they’re not the most popular free weights on the market, the StairMaster Twistlock adjustable dumbbells are actually a pretty interesting set. StairMaster has designed a really unique …