Brocas avellanadoras y escariadoras

A countersink bit cuts a conical recess that matches the tapered underside of a flathead screw, seating the head flush with the wood surface. A counterbore bit cuts a flat-bottomed cylindrical recess that recesses the entire screw head below the surface, typically to accept a plug.

The industry-standard angle for woodworking countersink bits is 82 degrees, which matches the taper angle of standard flathead wood screws. The 82° Professional Countersink Set from Infinity Tools uses this angle across all four sizes.

A tapered countersink bit combines a tapered pilot drill with a countersink in a single tool. The tapered pilot matches the taper of the screw shank, reducing splitting risk in dense hardwoods by allowing the wood fibers to compress rather than wedge apart as the screw is driven.

The 7-piece Tapered Drill Countersink Set covers seven of the most common wood screw sizes. Each bit combines a tapered pilot drill and countersink to drill and countersink in one pass, speeding up production assembly work.

Yes. The Make It Snappy 25-piece Quick-Change Countersink Drill Set is designed for quick-release chucks, allowing fast bit changes without tools—ideal for high-volume cabinet or furniture assembly work.

Yes. The Make It Snappy Replacement Drill for Straight Countersinks is sold separately, letting you replace only the pilot drill rather than buying a new complete countersink assembly.

Flat-bottom counterbores create a cylindrical recess with a flat floor, used for recessing bolt heads, barrel nuts, and threaded inserts, as well as accepting wooden plugs to cover screw heads in furniture and cabinetry. The Make It Snappy SD-3 Flat-Bottom Counterbores are precision-made for these applications.

The 1/8" to 1/4" Adjustable Countersink allows the depth and diameter of the countersink recess to be adjusted without changing bits, making it useful for experimenting with different screw sizes or dialing in the right seat depth for flush installation.

Yes. All products sold by Infinity Tools are backed by the Infinity Tools quality guarantee against manufacturing defects. Contact support if you experience any issues.

Full shipping details, including available methods and estimated transit times, are listed on the Infinity Tools shipping policies page.