Description:  High Speed Steel Black Oxide Reduced Shank Drill Bit with 1/2 inch Shank Twist Drill Bit.  Drills are precision ground to maintain a high degree of concentricity between shank and body diameter.  These bits are ideal for drilling in low and medium tensile strength materials.  76mm flute length and 152mm overall length.  Black oxide treatment adds lubricity and creates small pockets on the surface of the tool that act to hold coolant near the cutting edge.  These drills expand the size range capacity of a portable drill chuck, common flute and overall length for minimal adjustment during tool changes.  Processed iron, steel, plastic, wood, copper, aluminum and other metal materials.  Durable, mainly used for bore machining.     Specification:  Material: High speed steel.  Finish: Black oxide finish.  Conventional point: 118° conventional point.  Diameter: 13.0-40.0mm.  Shank: 1/2 inch shank.     Package Included:  1 x 1/2 inch shank drill bit