Irwin Screw Machine Drill, Series: 201, Imperial, #18 Drill - Wire, 0.1695 in Drill - Decimal Inch, 1-1/8 in Overall Length, 1-1/16 in Cutting Depth, Spiral Flute, 1-1/16 in Flute Length, 0.169 in Shank, Straight Shank, 135 deg Point, Split/Self-Centering Point, Right Hand Cutting Direction, HSS Cutting Edge, HSS, Oxide Treated, Applicable Materials: Aluminum, Brass, Copper, Wood/Drywall, Sheet Metal, Mild Steel, High Alloy Steel, Stainless Steel, Cast Iron and Plastic