The HSS Countersink 8.3mm with a 1/4" Shank is designed to create a precise chamfer around pilot holes, ensuring countersunk screws sit flush. With a 90° angle, this countersink is ideal for cleaning, enlarging, and countersinking holes in a variety of materials such as aluminum, metal, plastic, steel, wood, and brass. Made from High-Speed Steel (HSS), it delivers a smooth finish and maintains hardness even at high temperatures, making it efficient for faster cutting. The tool features reduced clogging, improved clearance, and chatter-free operation for minimal mechanical vibration. Key Features: Angle: 90° flutes for accurate chamfering and countersinking Material Compatibility: Suitable for aluminum, metal, plastic, steel, wood, and brass Performance: Provides a smooth finish with reduced clogging and enhanced clearance Operation: Chatter-free with less mechanical vibration Material: Made from HSS for durability and efficient cutting at high temperatures Shank: 1/4" shank for use with machines and portable tools