General description This 6-piece set of 90° HSS countersinks is ideal for creating countersunk holes for screw heads and plugs. Made from carbon steel with a titanium coating, these tools are sturdy, durable, and resistant to rust, ensuring a long service life. They are perfect for home DIY projects and daily use, allowing for efficient drilling without burrs. Technical specifications Head diameter and shank diameter for each cutter: 6.3MM: 6.3MM * 5MM * 37MM 8.3MM: 8.3MM * 6MM * 40MM 10.4MM: 10.4MM * 6MM * 39MM 12.4MM: 12.4MM * 10MM * 46MM 16.5MM: 16.5MM * 10MM * 47MM 20.5MM: 20.5MM * 10MM * 47MM Compatibility and accessories This kit is universally compatible with all types of drill bits and drilling machines, including vertical drilling machines and common end mills. The package contains 1 set of 6 three chamfering drills. Usage These countersinks are suitable for working on various materials, including: Carbon steel Light iron Insulation boards PVC panels Aluminum Hardwood Slack