With the International Tools 49.240 countersink bit set from the eco range, you can cleanly deburr and chamfer drilled holes for a professional flush finish. The 3-flute geometry ensures smooth, chatter-free cutting in metal, wood, and plastic, seating 90° screws perfectly level with the workpiece surface. This 6-piece set manufactured to din 335-C standards includes diameters of 6.3 mm, 8.3 mm, 10.4 mm, 12.4 mm, 16.5 mm, and 20.5 mm with a 90-degree point angle. Crafted from durable hss with a cylindrical shank, they fit securely into standard drill chucks on both handheld drills and drill presses for dependable everyday workshop use.