Lenox 30908VB8 Lenox Vari-Bit VB8 Step Drill Bits, 3/16-inch to 7/8-inch (30908VB8)

30908VB8 Vari-Bit 3/16″ thru 7/8″ Step Drill Bit. The Lenox 30908VB8 Vari-Bit 3/16″-7/8″ Step Drill Bit features: 12 Steps from 3/16″ to 7/8″ in 1/16″ increments. Hole sizes: 3/16, 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8″. Metric Hole sizes: 4.8, 6.4, 7.9, 9.5, 11.1, 12.7, 14.3, 15.9, 17.5, 19.1, 20.6, 22.2 mm. Chuck diameter: 3/8″ (9.5 mm). Patented 2-Flute Design cuts fast, clean, burr-free, round holes. Split Point Design starts on contact for fast penetration and less walking. Steam Oxide Coating improves durability for longer tool life. Enhanced Flute Design for more rapid chip removal.