Enerpac – Improve the safety and speed of your next lift with the Self-Locking Cube Jack Features • Mechanically locked during lifting and lowering operations so blocks are removed in a safe condition instead of being held on hydraulics • Self-aligning steel cribbing blocks save time, improve side load, and eliminate the need for wooden cribbing materials • Save time, 50% less cycles than climbing jacks • Reduce manpower required, two people do the same work as four people in 1/4 the time