Diamond Files are used to get the best edge tune possible and a must-have for racers and enthusiastic technicians. Used after an edge has been prepared with a standard file or grinder they come in different grades which are ‘worked through\' until the perfect finish is achieved. Coarse will remove major burrs left after an edge has been ground. Medium is the next step and will smooth the edge further, then a fine diamond file will polish the edge for the best end result. Diamond files are usually used in a guide to provide precise edge angles.