MORSE Jobber Length Drill Bit, General Purpose, Series: 1364, Imperial, #21 Drill - Wire, 0.159 in Drill - Decimal Inch, 3-1/4 in Overall Length, 2-1/8 in Cutting Depth, High Spiral Flute, 2-1/8 in Flute Length, 0.159 in Shank, Straight Shank, 118 deg Point, Standard Point, Right Hand Cutting Direction, HSS Cutting Edge, No Through Coolant, HSS, Bright, Applicable Materials: Aluminum, Copper, Magnesium, Plastic, Soft Steel and Zinc