(152.5Mm | 6") HSS M42 with 8% Cobalt Bi-Metal Hole Saw with 2 Pilot Drill Bits
Made by M42 with 8% cobalt. M42 with 8% cobalt. The BI hole saw is made of M42 with a hardness of 67~70 HRC, good cutting performance makes drilling easier and smooth. 【Professional Use】The hole saws have variable tooth pitch.