Instead of relying on external cribbing built up manually around a traditional jack, the ring climber system incorporates aluminum stacking rings that become part of the cylinder assembly. As the cylinder extends to the end of its stroke, a technician inserts lightweight stacking rings (around 2.2 lbs. each) around the cylinder rod, between the load and the top of the cylinder housing. The rings are engineered to precise specifications and have a documented load rating. They lock into position to create a stable, predictable, load-bearing column. This innovative, ergonomic design eliminates the need to stack cribbing wood, which expedites the lifting process, optimizes accuracy and improves safety. Operators find it much safer and efficient to stack rings, not wood.