The Armeg 4 Piece Twister Containment Super-Set contains two drivers that can be used in your impact driver. Instead of swapping machines, from your impact driver to your drill and back again, the Armeg Twister series lets you keep using the impact driver to product the same results. The Armeg 17mm Twister Channel Driver can be used with M10 nuts and bolts as well as 41x 41mm and shallower 41 x 21mm channel. It festures machined flats that will allow easy access to the most commonly used size of channel. Also designed to be used in an impact driver as part of the twister range, the Channel Driver has been made from high quality alloy for incredible durability as well as bored 15mm spacing to accommodate extruding bolt threads for additional versatility --- The Roofing bolt driver bits, made in the UK, include a unique patented cruciform design that has been specifically made to work with roofing bolts. The design ensures that driving the bolts is easier and camming out is prevented. The 4 Drive wings provide increased contact with the drive edges, improving power transmission efficiency via a stronger and more secure location in the bolt. It also dramatically reduces bolt head damage caused by traditional screwdriver slippage. The quick change shank is Twister impact rated for impact drivers while the rare earth magnet maximises the connection with the roofing bolt for secure holding and easier start ups. The 14mm x 100mm Bolt driver is suitable for most 6mm thread bolts while the 11mm x 76mm Square nut roofing bolt driver is suitable for most 10mm and 11mm square nuts. --- The Twister Magnetic Nut Driver is for fastening sheet metal screws and hexagonal nuts bolts. Featuring a quick-change shank, this can also be used in impact drivers. Theyre made with a high quality alloy for durability and strength in high torque applications --- The Belt Loop Bit Holders feature a quick click and release system to securely hold your favourite Armeg Hex shank Twister branded product, while the strong Carabiner Clip fastens onto a belt or bag loop to keep those most-used bits to hand. The quick-bit release mechanism automatically releases the bit when the collar is drawn back for an easy, one-handed operation.