Blu Mol Xtreme Ct 3 Teeth Holesaw 54mm 750138 THBSI22 Teng Impact Bits Size:Adapters THBSI22 Teng Impact Bits Set 22 Piece A 22 Piece Impact Bits Set in a handy Teng Tools bits holdercomplete with clip ring for use on a belt or with a TengTools safety wire includes 20 assorted bits together with60mm 1 4 hex magnetic impact bit holder and a 1 4 drivesocket adaptor Based on heavy duty high pressure gear oil and modified to resist fling off at high speed and high temperatures Heavy duty construction for long life with large gullets for easy slug removal Heavy duty abrasion resistant tungsten carbide teeth will cut materials that quickly dull normal hole saws