Halls XCM High Speed Steel Countersink

The Halls XCM High Speed Steel Countersink in 16.5mm size is designed for large countersunk fasteners used in heavy industrial applications, structural steelwork, and substantial fabrication projects. This substantial diameter accommodates M12 and larger countersunk bolts, making it essential for civil engineering, shipbuilding, and heavy machinery maintenance. Constructed from premium high speed steel with a robust 3-flute design, this 16.5mm countersink delivers powerful cutting performance whilst maintaining precision and control. The 90° included angle ensures proper fastener seating even in thick steel plates and heavy structural components where large countersunk fixings are specified. The 1/4in hexagon shank provides secure engagement with powerful cordless drills and impact drivers, enabling efficient work on substantial metalwork where larger countersunk fasteners demand professional-grade tooling and reliable performance. Features and Benefits: • 16.5mm cutting diameter for M12 and larger fasteners • High speed steel construction withstands heavy-duty use • 3-flute design ensures efficient material removal • 90° angle creates proper countersunk profiles • 1/4in hex shank for power tool compatibility • Ideal for structural and heavy industrial applications Specifications: Countersink Type: Countersink Size (mm): 16.5