Dormer A77712.0 A777 HSS-E/HSCO Cobalt Jobber Drill 12.0mm (Single) The Dormer A77712.0 is a 12mm Heavy-Duty Cobalt Jobber Drill coated with Bronze. The A777 HSS-E High Speed (8%) Cobalt Jobber Drill Bit has a 135 Degree Split Point. Designed for use when greater heat is generated during drilling, e.g on higher tensile, tougher materials and in particular the Aerospace Industry. Features: 135 degree split point - Help with self-centring and reduce the push force required Bronze oxide finish - Prevent work piece material from sticking to the cutting edge Improved accuracy - Produce more accurate holes both size and finish quality Premium HSCO material - Can be used for drilling hard materials incl. tool steels Heavy duty design - Recommended to use in difficult materials & applications Specification: DIN338 Head Diameter: 12.0mm Cutting Length: 100mm Overall Length: 150mm