The starrett kdc10021 deep cut bi metal deluxe 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 a sturdy eva carrying case these kits will be an invaluable addition to any toolbox contains 6 x holesaws 20 22 25 29 35 44 51 64 68 76mm2 x arbors a1 and a2