DescriptionThis is a professional 5 pcs countersink drill bit set. Industrial grade high-speed steel for higher durability and sturdiness. Suitable for drilling in tough material, including aluminium, cast iron, brass, copper, magnesium alloy, plastics, etc.Feature- Color: As shown - Material: High Steel - Bit diameter: 7.1 x 1 x 1mm - High-speed steel with coating treatment, tougher and more abrasion resistant for longer working life and high work efficiency. - Round design drill bits, accurate and fine, increase drilling speed. - Mainly for drilling wood, plastic, fiberglass, printed circuit board, and metal including copper, aluminum, tool steel, cast iron, and heavy-duty abrasive alloy metal, etc. - for home DIY, building and engineering use etc.
