8pc. Cobalt Silver & Deming 1/2" Shank Drill Bit Set

Material: M35 High-speed steel (HSSCO) tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance. Features: Black and gold polished treatment adds lubricity and creates small pockets on the surface of the tool that act to hold coolant near the cutting edge.  135-Degree split point for accurate centering and fast penetration and 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. Ideal for drilling in cast iron, zinc alloy, copper, stainless steel and so on.