Hole Saw Accessories Quick Change Hole Saw Arbor Shank Size 1/2 In. Shank Shape Hex Thread Size 1/2 In.-18 Fits Hole Saw Dia. 1-1/2 In. to 6-5/8 In. Pilot Drill Size 1/4 In. dia. x 7-5/16 In. L Material Carbide Tipped Replacement Pilot Drill. Features For use with patented Rapid Switch and Rapid Core Eject Hole Saws Immediate and effortless plug removal Smooth cuts even at low speeds Tungsten Carbide TippedSpecifications Weight: 0.49 lbs - SKU: WLLCH23128