With the Facom 229.TTJ4 conical countersink set, you deburr drilled holes cleanly and seat screws perfectly flush with the workpiece surface. This 4-piece set features a 90° point angle and includes cutter diameters of 10.4 mm, 16.5 mm, 20.5 mm, and 25 mm with a 6 mm or 10 mm cylindrical shank. It gives you the versatility to prepare neat chamfers for countersunk screws and bolts across various workshop jobs. The included lubricant reduces friction and extends tool life during cutting. Kept in a durable metal storage box, your countersinks stay protected, organized, and ready for use.