The PowerBlock EXP’s are stage 1 dumbbells that can be expanded in weight to adjust to the current needs of the user. These compact dumbbells are designed to be easier to control and balance and can go from 5lb – 50lb, which replaces the need for 16 pairs of standard fixed-weight dumbbells. They feature a patented selector pin system and are equipped with two 1kg ‘adder weights’ that slot inside the handle for micro-incremental training in steps of 1kg per hand. The new auto lock feature automatically locks the adder weights into place when put into the weight stack.
For more information on PowerBlock Dumbbells and other Powerblock Products check out thier website: http://www.powerblock.com/index.php