The BlueSpot 3 Piece Hex Shank Countersink Set provides carpenters, joiners, and general tradespeople with a versatile selection of countersink bits for creating flush, professional screw fixings in timber and similar materials. Constructed from heat-treated carbon steel, these countersink bits are built to withstand the demands of regular use on site or in the workshop. The heat-treatment process improves hardness and edge retention, helping the bits maintain their cutting performance over time. The set covers the three most commonly used countersink sizes — 12mm, 16mm, and 19mm — making it a practical choice for a wide range of fixings and screw heads. The universal ¼in hex shank design ensures compatibility with any hand drill or power drill fitted with a standard hex bit holder. Features and Benefits: • Heat-treated carbon steel construction for strength and long-lasting durability • Three popular sizes included: 12mm, 16mm, and 19mm • Universal ¼in hex shank compatible with hand and power drills • Ideal for creating flush screw fixings in timber and similar materials Specifications: Sizes: 12mm, 16mm, 19mm Shank: ¼in hex Countersink Type: Mixed Set