The Keo 82 Deg 6 Flute 7 Piece Countersink Set by Keo Cutters USA is a high-quality tools set designed for precision drilling and countersinking in various materials such as cast iron, heat-treated steels, titanium alloys, and plastic. The set includes 7 pieces with sizes ranging from 5/16" to 1 inch, ensuring that you have the right size for any project. Made of durable cobalt material this set is perfect for professionals in CNC, metalworking, and manufacturing industries. The included 82-degree angle and 6 flutes provide optimal performance and accuracy.  See photos.