Purpose HEX set of bits in a holder designed for mounting and dismounting type fasteners Slot: H4, H5, H6, H7, H8, H10, H12, H14, H17. This set of replacement bits is suitable for use with the ratchet arms and holders, with a mounting 1/2 square. "Long 100mm bits can effectively work in confined spaces and provide a secure grip with slot fastener. Material Nozzles are made of a top-hardened steel of high grade S2 quality. In the composition of the steel contains molybdenum and silicon, which gives the product a high resistance to loads and low threshold reversible deformation. Sami head made from durable Cr-V steel, such combination makes the nozzle reliable, durable tool with a long service life. .. case The entire set is placed in a durable plastic case with metal latch, stylish design STORM series of metal locks will save the case of accidental opening box is easy to carry and store, it is compact and does not occupy much space in the heads of Options bits 1/2 ":. H4, H5, H6, H7, H8, H10, H12, H14, H17.