This adjustable pin key is for use with locknuts on angle grinders when fitting or removing abrasive discs It is a fully adjustable pin wrench from 15 to 52 mm with a pin diameter of 4 mm The stepped spanner handle can be used to undo nuts from 10 to 19 mm The FAIPINKEY is an ideal replacement pin wrench for most angle grinders, bench grinders, mitre saws and circular saws Capacity: 15 - 52 mm Pin Dia: 4 mm Spanner : 10 - 19 mm Faithfull 5 Year Manufacturers Guarantee, Weight: 0.2 pounds, Manufacturer: Faithfull