Drill America - DEWCCDS1-6 6 Piece High Speed Steel Combined Drill Bit and Countersink Set (#1 - #6), DEWCCD Series
- High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance.
- Black oxide treatment adds lubricity and creates small pockets on the surface of the tool that act to hold coolant near the cutting edge.
- Round shanks allow use with a wide variety of toolholding systems.
- When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging.
- Used for producing center holes in work pieces which require machining between centers.