The Jerk is an explosive full-body action that strengthens the legs, upper-body and overall stability. The split landing position further develops single-leg stability, beneficial for sports performance and global strength. The MA1 Wooden Jerk Box removes the need to clean the bar to the front rack position after each repetition and give the lifter added confidence in the vulnerable lockout stance. Constructed of durable 20mm structural grade ply (four interlocking boxes; 38cm, 30cm and 2 x 15cm blocks), the jerk blocks can easily and reliably handle heavy overhead drops. Get your hands on a pair below!