The starrett kdc07021 deep cut bi metal plumbers 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 7 x holesaws 19 22 29 38 44 51 57mm2 x arbors a1 and a10