Short Hex Bit: Hex / Allen Key Sockets Manufactured from chrome vanadium steel for strength and durability Metric Allen Key sockets 3/8" Drive so will fit any 3/8" drive ratchets / extensions / bars etc... Total length of the Allen Key sockets 48mm Comes in a foam tray for easy storage and transportation Set includes the following: 2mm / 3mm / 4mm / 5mm / 5.5mm / 6mm / 7mm / 8mm and 10mm Long Hex Bit Description: Professional tool for commercial or occasional use Manufactured from chrome vanadium steel for strength and durability 3/8" square drive so will fit any 3/8" drive ratchet / bars etc... Extra long bits (110mm total length) so ideal for access into those hard to reach awkward areas Metric sizes Comes in a blow molded case for easy storage and transportation Includes Sizes: 3mm, 4mm, 5mm, 6mm, 7mm, 8mm and 10mm.