Catalog > Tools and Production Equipment > Hand Tools > Screw Drivers and Alignment Tools SCW081M4 Precision Hex Nut Driver M4 172mm Precision Hex Nut Driver M4 72mm working length Part No: SCW081M4 Discontinued Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Additional Information Spec M4.0 Working Length 72mm Overall Length 172mm