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. Total length 55mm. M19 / 19mm impacted allen / hex key set. 1/2" drive so suitable for use with any 1/2" drive ratchet / extension / power bar. Short Metric Allen / Hex Socket. Ideal for use on Impact Guns. Suitable for high torque applications.