The Bi-Metal holesaw range have a vari-pitch tooth design and are recommended for cutting steel, aluminium, copper, brass, wood and plastic The Makita D-47282 is a 12 Piece Set containing 9 x different sized Hole Saws: 19, 22, 29, 35, 38, 51, 54, 57 and 68mm with 2 x Arbors and an Eject Spring. These Holesaws are designed for fast cutting and long life thanks to their Bi-metal construction with variable tooth pitch. This is the ideal kit for Electricians but can also cut easily through steel, aluminium, copper, brass, wood and plastic for a number of different applications. Comes in an attractive Aluminium Carry Case for ease of transportation and maximum protection. Features: The Bi-Metal holesaw range have a vari-pitch tooth design and are recommended for cutting steel, aluminium, copper, brass, wood and plastic Application: Trunking, conduit, pipe, kitchen, bathroom Hardwood, Softwood, Metal, Mild Steel, Aluminium, PVC Features: Bi-metal holesaws with variable tooth pitch Arbors available with hex (3 jaw chuck) and SDS-PLUS shanks Fast cutting and long life. Sizes carefully selected for the needs of the professional electrician Aluminium case Specification: Holesaw sizes: 19, 22, 29, 35, 38, 51, 54, 57, 68mm, plus 2 Arbors and 1 eject spring