Long lasting, fast cutting and versatile. Plug removal as easy as 1-2-3. Speed Slot features a staircase design for easy plug removal. Enhanced tooth geometry, a thin kerf design and an advanced coating contribute to the efficiency of the cutting process for up to 2x life in metal cutting. Thick backing plate with holes for drive pins resists damage due to high torque. Reinforced to cut stronger, last longer and resists tooth strip pageUse this hole saw with a 2L, 3L, 6L, 7L standard arbor or a 2L, 6L snap-back arbor.High speed steel teeth resist breaking and offer extended lifeThick backing plate with holes for drive pins resists damage due to high torqueUnique tooth configurationPatented vari-tooth design optimizes cutting for fast cuts and long tool lifeResists tooth strip pageBi-metal construction creates a hardened edge to minimize tooth strippingUse standard arbor3-1/8 in. diameter