Professional tool for commercial or occasional use Hex / Allen Bit Socket Metric Allen Key socket Impacted Allen / Hex bit for added strength and durability Manufactured from chrome vanadium steel for strength and durability Extra-long access for access into restricted hard to reach areas Total length 78mm M10 / 10mm Impacted Allen / Hex Key Set 1/2" Drive so suitable for use with any 1/2" drive ratchet / extension / power bar