Pullum Forearm Blaster - Wrist RollerIf you want to build your grip or your forearm muscles then take a look at the Pullum Blaster. Available in 48mm diameter knurled grip will ensure you can get and keep your grip . To use this you simply roll or unroll the connected rope which can hold a loading pin and any amount of weight. Please Note: Pullum kit is made to order so please allow up to 6 weeks for manufacturing time.