3pcs 1/4" Hex HCS Chamfering Cutter 5 Flute Drill Bits for Chamfering Countersink Countersink 12mm/16mm/19mm For Wood Metal

Use: Ideal for drilling 90-degree holes in wood and soft metals. Countersunk screws and fasteners. With a 6.35mm shank diameter and 20mm length, it can be used with an electric drill or battery. Unique Process: High-quality, wear-resistant, non-slip surface ensures increased comfort and convenience. Surface treatment: blackening treatment. Size: Commonly used sizes include 12mm, 16mm, and 19mm, all with 1/4" hex quick-change shanks. Angle: 90 degrees. Five-flute chamfer conical cutter. Heat treatment: high-frequency hardening increases hardness. Durable: High-quality, high-carbon steel, durable and rustproof, long service life.