600638H Hole Saw Arbor, Arbor Type Quick Change, Thread Size 1/2 In.-20, Arbor Shank Style Hex, Arbor Shank Size 1/2 in, Fits Hole Saw Dia. - Imperial 9/16 in to 1-1/4 in, Fits Hole Saw Dia. - Metric 14 to 32mm, Includes Pilot Bit Yes