IRWIN MECHANICS NO.4 – 4-1/2″ JAW

Rigid and robust, the body and sliding jaw are cast from close grained grey iron which is CNC machined on all friction surfaces for a smooth reliable action.
The jaws, handle and main screw are steel, the latter having a two-start rolled acme thread to speed the jaws from fully closed to fully open with a minimum of winding.
Model 4
Jaw Width 114mm
Jaw Depth 75mm
Jaw Opening 140mm
Base Width 137mm
Base Length 81mm
Net Weight 19.0kg