DORMER PRAMET Countersink Drill Bit HSS, 3 Flute, 90°, 1 Piece, G506 Series (Head Diameter Range: 6.3 mm - 50 mm) is designed for precision countersinking, chamfering, and deburring operations in demanding industrial and engineering applications. Manufactured from high-speed steel (HSS), this countersink drill bit delivers excellent durability, wear resistance, and reliable cutting performance across a wide range of materials. Featuring a 3-flute design and a 90° cutting angle, the G506 Series ensures smooth cutting action, efficient chip evacuation, and superior surface finish while producing accurate countersinks for standard fasteners and screw heads. The optimized flute geometry minimizes vibration, improves machining stability, and enhances dimensional accuracy, resulting in consistent and high-quality performance. With head diameters ranging from 6.3 mm to 50 mm, it is suitable for workshops, fabrication units, maintenance departments, CNC machining centers, and general engineering applications. Supplied as a single-piece tool, DORMER PRAMET Countersink Drill Bit HSS, 3 Flute, 90°, G506 Series (Head Diameter Range: 6.3 mm - 50 mm) combines precision, durability, and dependable performance, making it an excellent choice for professional countersinking, chamfering, and deburring tasks.