The starrett kdc06021 deep cut bi metal general purpose 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 22 29 35 44 51 64mm2 x arbors a1 and a10