Product Description Pilot Drill Bit, Shank Size 1/4 In., Shank Shape Round w/3 Flats, Fits Hole Saw Dia. All, Replacement Pilot Drill No. Mfr. No. 49-56-8010, Material High Speed Steel, Pilot Drill Size 1/4 In. dia. x 3-1/2 In. L, Overall Length 3-1/2 In., For Use With Milwaukee Hole Saws, Includes (1) 1/4 In. x 3-1/2 In. Pilot Bit From the Manufacturer Arbor Pilot Bit fits Milwaukee Arbors 49-56-7010 and 49-56-7150 for general cutting in wood and metal. One per package.