Product Info Catalog Tools Power Drill, Bits & Accessories Step Drill Bit, 1/4 to 3/4-In. Step Drill Bit, 1/4 to 3/4-In. Request a Quote UPC: 38548101033 SKU: 411207 Model Number: 10233 Unibit, 1/4" to 3/4" step drill, 9 hole sizes from 1/4" to 3/4" in 1/16" increments, maximum material thickness 1/8", 3 flatted shank, shank size 3/8", single fluted cutting edge assures true round holes & allows greater control.