Add to Wish List Quick view BAC #: UNIBIT Irwin Unibit Step Drill Bits In Stock IRWIN Single-fluted cutting edge assures true round holes, and allows greater control with less vibration. Ideal for drilling holes in thin metals such as mild steel, copper, brass, aluminum, plexiglass, wood, and laminate. Unibit-1 Hole Sizes... MSRP: Now: $32.09 - $134.21 Was: View Price Breaks MSRP: Now: $32.09 - $134.21 Was: Quick view Qty in Cart: 0 Price: MSRP: Now: $32.09 - $134.21 Was: Subtotal: