The Armeg 5 Piece Bush Installation Set is a selection Hex attachments to deal with conduit bush fittings along with two Acceler8 holesaws. Thanks to the unique, low profile design, the hexagonal recess positively locates on the bush for a secure fit and reduced slippage. Ideal for use with a ratchet for faster and easier tightening, the brocket is perfect for working in tight areas as well as awkward access installations. Made with high quality alloy for incredible durability, the UK made brocket set has a 14 Hexagon shank in accordance with ISO 11732001e that allows use in bit holders ratchets etc. The Armeg Acceler8 Impact Holesaw has been specifically designed for drilling sheet steel. With drilling speeds of 3.4 seconds and 37 faster than a standard holesaw, Acceler8 is the fastest way to drill sheet steel They have an impact rated shank for use with impact drivers Internal ejection spring automatically ejects the metal disc for hassle free drilling