Powerfit AMBAC (unback) system for pin release prevention The use of the AMBAC (unbag) system prevents pins from popping out when using an impact wrench.
BP4M-30T Size: 1.2 inches (30 mm) pin release mechanism AMBAC (unback) system (PAT).Pin ring sold separately.
The photo is for illustration purposes only, color and shape may differ depending on the model number selected.