Ruko 102413 Flat Countersink Drill Bit DIN 373 HSS Diameter 18.0 mm

Amazon Marketplace

To produce cuts for cylinder head bolts, hex bolts and nuts. Great for burr-and chatter-less sinks in steel, cast iron, non-ferrous and light metals. Great results at low cutting speed., Manufacturer: RUKO GmbH Präzisionswerkzeuge

ManoMano

For cylinder head screws, bolts and hex nuts. For steel, cast iron, non-ferrous metals and light metals. Best results at low cutting speeds.