Hole Saw Arbor Arbor Type Quick Change Thread Size 1/2 In.-20 Arbor Shank Style Hex Arbor Shank Size 3/8 in Fits Hole Saw Dia - Imperial 9/16 in to 1 1/4 in Fits Hole Saw Dia - Metric 14 to 32 mm Includes Pilot Bit Yes Pilot Bit Material High Speed Steel