The starrett kdc13021 deep cut bi metal universal 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 13 x holesaws 20 22 25 29 32 35 38 44 51 57 64 68 76mm2 x arbors a1 and a2