The Starrett KFC12021 Bi-Metal Fast Cut Plumbers & Electricians Holesaw Kit is suitable for all tradesmen, installation engineers, industry generally and the DIY enthusiast, Starrett kits feature a range of saws with sizes selected specifically to suit the relevant application. Packed in our new sturdy EVA carrying case, these kits will be an invaluable addition to any toolbox. Contains: 12 x Holesaws: 16, 20, 22, 29, 35, 38, 40, 44, 51, 57, 65 & 68mm.2 x Arbors: A1 & A2.