Stahlwille 734K Calibrating 3/8″ Square Drive Insert Tool, Size 5, 9×12 mm

Description

Stahlwille 734K Calibrating Square Drive Insert Tool, Size 5; 3/8″ Drive, for 9×12 mm toolholder

Without a ball or pin (so not suitable for bolt tightening)
Optimum measuring results during calibration thanks to reduced lateral forces