Collection: Counter Sink Bits

Essential for creating flush-mounted fastener installations, countersink bits produce the angled recesses needed for flathead screws and rivets to sit perfectly flush with material surfaces. Whether you're working with steel, aluminum, or composite materials, these precision cutting tools deliver clean, accurate countersinks with consistent angles and smooth finishes. From standard 82° and 90° angles to specialty profiles, these cost-effective bits help ensure professional assembly results and proper fastener seating. Built with sharp cutting edges and durable construction for reliable performance across manual and machine operations. With access to over 50,000 products, we can source exactly what you need.