Professional Allen / hex bits for commercial or occasional use Impact hex Allen key bits Impacted hex bits so ideal for impact guns or high torque tools 1/2" drive so will fit any 1/2" drive ratchets ,impact guns, breaker, power bars etc... Manufactured from chrome molybdenum steel and treated for extra strength and durability 10pc hex bit set Metric size hex bits ranging from 5mm – 19mm (H5 – H19) Metric MM hex bits Total length of the hex bits – 80mm SET INCLUDES THE FOLLOWING SIZES • 5mm, 6mm, 7mm, 8mm, 10mm, 12mm, 14mm, 16mm, 17mm and 19mm Comes in a blow molded case for easy storage and transportation