Pullum Wooden Jerk Box/Jerk BlockStackable jerk boxes, or jerk blocks, are often used in weight training as a way for athletes to focus on improving their jerk without having to clean the weight to the rack position on each rep. The Pullum Jerk Blocks are designed to be robust and flexible so they are also used for block pulls, clean snatch from blocks, partial deadlifts, floor presses, step ups, box jumps etc. The Top Block (7. 5cm Block) must be used on the top of the stack when