Why choose our adjustable dumbbell set? Hezeyferg dumbbells adjustable weight features security locks, which not only ensure that the weight block will not slip during the strenuous exercise but also can achieve 1-second weight adding or removing. This safe and convenient weights dumbbells set can help you switch training modes smoothly and easily. Moreover, the multiple optional weights of the adjustable weights allow you can work out with different aerobic and strength training exercises with only 1 set, which brings more possibilities to your workout. This multifunctional dumbbell set can help you do full body workout, suit all your training needs! Anti-slip Handle & Safe Lock The handle of Hezeyferg weight adjustable dumbbell adopts non-slip texture, which ensures that the dumbbell will not slip even after sweating. All weight block features safety lock to prevent accidental fall during intense workouts. 1-Second Weight Adjustable This weight blocks of the adjustable dumbbells can be easily assembled and disassembled. Add the block along the groove, or slide the button to remove the weight block. This operation can be done in a second which is very simple and convenient. Space Saving Our weight women home has multiple selectable weights which is equivalent to multiple pairs of fixed weights. That means this adjustable hand weights won't take too much space. You can put it in the corner of your home and don't worry about getting cluttered! Warm Tips: 1.Warm up before exercise to avoid strain. 2.Make sure the adjusting block is secured before use.