Master mechanic, 1 piece 5/8″ bi-metal hole saw, m3 high speed steel cut edge, 1-7/8″ depth of cut, 4/6 variable tooth pattern provides less vibration, delivering faster, smoother cuts then conventional hole saws, features built in 3/8″ mandrel which may be used with 3/8″ or larger drill, recommended for cutting soft or hard wood, nail embedded wood, stainless steel, pipe, rubber & conduit, pilot drill included.