Hardened Black Alloy Steel (Self Colour) Short Arm Allen Keys Short arm and L shape ensure easy and comfortable grip Strong, durable product ideal for a variety of jobs 1.3mm- 12mm sizes available in pack sizes of 1- 20 pieces 3mm Metric Short Arm Allen Keys- DIN 911, Black Alloy Steel, Size Across Flats- 3mm, Long Arm Length- 63mm, Short Arm Length- 20mm.