Professional Allen hex keys for commercial or occasional use Metric impact Allen key sockets Metric hex bits Metric sizes ranging from 4mm – 19mm Manufactured from chrome vanadium steel and then impacted for strength and durability 1/2" drive so will fit any 1/2" drive ratchet, extensions, bars, impact guns etc... Impacted bits so will stand use with high torque tools Short stubby allen key perfect for access in tight restricted areas Total length of the sockets (complete) – 55mm SET INCLUDES THE FOLLOWING SIZES • 4mm, 5mm, 6mm, 7mm, 8mm, 10mm, 12mm, 14mm, 17mm and 19mm Comes in a metal tin for easy storage and transportation