The Dormer G136 HSS 90° Countersink is designed to provide precise and efficient cutting for countersunk-head screws. Manufactured from high-speed steel (HSS) with a bright finish, this bit delivers excellent durability, performance, and smooth operation in various materials. With a 90° cutting angle and three-flute design, the G136 HSS 90° Countersink allows for clean, accurate conical seats, ensuring a perfect fit for countersunk screws. The Dormer G136 HSS 90 Deg Countersink is suitable for use in free-machining steels, plain carbon steels, alloy steels, copper, and copper alloys, making it an essential tool for a wide range of machining and fabrication tasks. Features and Benefits • Bright (uncoated) • High Speed Steel Tool Material • DIN 335 C – Straight Shank Countersink Standards • Right Hand Rotation / Cutting • 90° Countersink • Cylindrical Shank / Straight Shank