High-quality countersink drill bit — HSS / M2 / M35 cobalt with M35 TiALN coating, 15–20 mm (1 piece) Key benefits Precise, repeatable countersinks: engineered for accurate hole creation and consistent 90-degree chamfering so fasteners seat flush and assemblies align correctly. Cleaner edges with less rework: the design deburrs and chamfers in a single pass, reducing finishing time and improving final appearance. Longer tool life and reliability: M35 TiALN coating increases hardness and wear resistance, so the bit stays sharp longer under repeated use. Efficient, accurate drilling operations: the hole-type design helps center and guide the bit for stable cutting and predictable results. Main features Construction: made from HSS with M2 and M35 cobalt grades for toughness and heat resistance. Coating: M35 TiALN (color indicated) for increased surface hardness and wear protection. Function: optimized for deburring and creating 90-degree chamfers. Size: single-piece tool covering the 15–20 mm range. Packaging: supplied as 1 piece. How this solves common problems Prevents loose or misaligned fasteners by creating consistent countersinks that match screw heads. Reduces secondary finishing by removing burrs and sharp edges at the source. Extends service life compared with uncoated bits, lowering replacement frequency and downtime. Typical applications Hardware installation: creating tidy, flush screw seats when fitting hinges, cabinet hardware, or metal brackets. Fabrication and maintenance: deburring and chamfering holes after drilling in sheet assemblies and component work to reduce sharp edges and stress risers. Automotive and machinery work: preparing fastener seats and chamfers in repair or assembly tasks where precise 90-degree countersinks are required. What you get One countersink drill bit, color indicated by the M35 TiALN coating, size range 15–20 mm, made from HSS/M2/M35 cobalt for dependable performance and longer life.