An ideal dumbbell for if you want to add weights into your work out routines. Compared to adjustable dumbbells, this ONE PIECE dumbbell is safer because adjustable dumbbells are more likely to come loose. Also, you can change out weights more quickly than adjustable dumbbells – just grab a different set of dumbbells. RCL Hexagon Dumbbells are rubber-coated to protect your floor if the dumbbells dropped from your hand while in use. And its hexagon design improves safety as they stay put and won’t roll away. RCL Hexagon Dumbbells come with contoured handles. The handle has texture surface that allows you to grab and retain the grip without slipping during workout.