Irwin Jobber Length Drill Bit, Economy, Series: 681, Metric/Imperial, 4 mm Drill - Metric, 0.1575 in Drill - Decimal Inch, 3-1/4 in Overall Length, 2-1/8 in Cutting Depth, Spiral Flute, 2-1/8 in Flute Length, 4 mm Shank, Straight Shank, 135 deg Point, Split Point, Right Hand Cutting Direction, M2 HSS Cutting Edge, No Through Coolant, M2 HSS, Oxide Treated, Applicable Materials: Metal, Plastic and Wood