10 Pc Allen Wrench Key Set- Metric Metric allen wrench set with split ring keeper. Allen wrench sizes: 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, 5.5mm, 6mm, 8mm, 10mm. Hardened and tempered industrial grade chrome vanadium steel, with black oxide finish for durability Perfect addition to any shop, garage or household.