Drill Kits: Drill Bit Type - Step Drill Kit; Number of Bits - 3; Hole Min - 1/8 in.; Hole Max - 1-1/8 in.; Bit Part No - 35-521, 35-522, 35-523; Case - Durable Blow-Molded; Additional Information - Shank Size: 1/4 in.
Additional Info: Shank Size: 1/4 in.