This HSS drill bit from Toolpak features a 118deg tip cutting angle and a black oxide finish to strengthen the outside surface. A hot roll-forged process gives the bit good flexibility and break resistance, while the 12.7mm reduced parallel shank bit enables use in standard drill chucks. This HSS bit excels in all kinds of materials from aluminium, steel and non-ferrous metals to plastic and wood. It is manufactured to DIN338 standard. High carbon steel twist drill with high speed steel tip and polished, dry rust resistant coating. Large diameter bits with reduced 12.5mm diameter shank enables use with standard chucks. Use on aluminium, steel, plastic, wood and non-ferrous metals. Cutting oil required when drilling metallic materials.