Cut at an angle, and use two adapters (second adapter sold separately) on one pilot bit to enlarge existing holes. All Spyder hole saws fit on Spyder Rapid Core Eject arbor/pilot bits, and on univerudes Saws: 3/4, 7/8, 1-1/8, 1-1/2, 2, 2-1/8, 2-1/2 Pilot Bits: Hex8 HSS, Hex10 HSS Arbors: Hex8, Hex10 in a case.
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