Professional tool for commercial or occasional use. -Manufactured from chrome vanadium steel for strength and durability. -Metric sizes -Will fit any standard 1/2" drive ratchet / bar etc... -Total length of the Allen Key sockets 55mm SIZES INCLUDE THE FOLLOWING -7mm / 8mm / 10mm / 12mm and 14mm -Satin finish gives added corrosion resistance. -Shallow construction -Comes in a foam molded case for easy storage and transportation.