Countersink Bits

Countersink Drill Bits

The term countersink drill bit refers to a drill accessory that makes a cone-shaped hole or depression in wood, plastic, or metal. Shop Rockler for an extensive selection of single bits and sets of countersink drill bits.

When to Use a Countersink Drill Bit

Use a countersink drill bit to create a hole for a fastener that needs its top to remain flush with the material’s surface. Creating a countersink hole doesn’t just hide the fastener; it also eliminates deburring hazards by preventing the fastener from tearing out. When you need to drill a pilot hole in hardwood, for example, use a countersink drill bit.

Some drills come with a countersink bit in the starter set that accompanies the drill. Although it’s a specialty bit, the countersink bit works with most handheld drills and drill presses. Adding this bit to any drill turns it into a countersink drill.

Replacement Countersink Bits

Shop Rockler when you need replacement drill bits. We carry a wide range of countersink options from name brands, including Mibro, Insty-Bit, Kreg, and Rockler's own high-quality bits. Keeping drill bits in stock in your workshop extends the utility of your tools and accessories.