Viking Drill and Tool 00721 Type 78-UB Gold Oxide Ultra Bit (3 Piece) Special axial and radial flute design increases work piece penetration Dual flute construction drills clean accurate holes in thin materials, quickly and easily 3-Piece Gold oxide set 1/8 - 1/2, 3/16 - 1/2 and 3/16 - 7/8-inch Quantity: 1-per pack