Joinery Router Bits for Dovetails, Box Joints & Lock Miters

Precision Joinery Router Bits for Strong, Accurate Wood Assemblies

Joinery is the foundation of furniture and cabinetmaking that lasts. This collection brings together the specialized router bits and complementary accessories needed to cut dovetails, box joints, finger joints, lock miters, lapped miters, glue joints, and drawer-lock profiles — the full vocabulary of mechanical wood joinery achievable at the router table.

Each bit is precision-ground from micrograin carbide to produce tight, repeatable joint geometry. Accurate joinery depends on geometry as much as technique, which is why Infinity Tools pairs many joinery bits with setup blocks and jigs. A setup block removes the guesswork from bit height and fence position, turning a potentially tedious dialing-in process into a reliable repeatable routine.

Dovetail, Box Joint & Lock Miter Bits

Dovetail bits cut the angled pin-and-tail profiles used in drawer boxes and case work. Box joint and finger joint bits produce interlocking rectangular fingers that maximize glue surface on the end grain of boxes and carcasses. The lock miter bit — one of Infinity Tools' signature products — cuts a 45-degree interlocking miter that assembles without clamps and resists racking. Pair a lock miter bit setup jig package for fast, frustration-free registration.

For complementary work, see the joinery guides & jigs that ensure accurate positioning, browse router bit setup jigs & blocks sized for specific bit sets, and explore the parent routing collection for tables, lifts, and accessories. Door-making joints are covered separately in the door-making router bits collection.

Frequently Asked Questions

What router bits do I need to cut dovetail joints?

You need a dovetail bit (typically 14-degree or 8-degree undercut) for the angled tails, and a straight or spiral bit to clear the waste between pins. Infinity Tools offers a dovetail and box joint router bit set that bundles both profiles for complete hand-cut-style or jig-guided dovetails.

What is a lock miter router bit and what does it do?

A lock miter bit is a single large-diameter bit that cuts a 45-degree interlocking miter profile. The male and female halves of the joint self-align during assembly, eliminating the need for splines or clamping pressure to hold corners square. It is commonly used on box corners, column wraps, and cabinet stiles.

How do I set up a lock miter router bit correctly?

Lock miter bits require precise bit height and fence position to produce a flush fit. Using a dedicated setup block eliminates trial-and-error: the block registers against the bit to set the exact height, and a test cut in scrap confirms fence position before you commit to finished stock. See the router bit setup jigs & blocks sized specifically for Infinity Tools lock miter bits.

What's the difference between a box joint and a finger joint?

The terms are often used interchangeably. Both describe interlocking rectangular projections cut on mating boards. Finger joints tend to have thinner, more numerous fingers, while box joints use wider, fewer fingers. Both maximize end-grain glue area for strong corner joints in boxes and drawers.

Can I cut joinery router bit profiles with a handheld router?

Most joinery profiles — dovetails, box joints, lock miters — are best cut on a router table because the bit height must be held constant and the workpiece needs solid fence support. A handheld router can cut simple dadoes and rabbets used in joinery, but the specialized profiles in this collection are designed for table-mounted routing.

What is a glue joint router bit used for?

A glue joint bit cuts an interlocking S-curve or stepped profile along the long grain of boards, mechanically aligning mating edges and increasing the glue surface area by roughly 50 percent compared to a plain butt joint. It is used when edge-gluing boards into tabletops or panels for superior joint strength and registration.

What shank size should I choose for joinery router bits?

Use 1/2-inch shank bits for all joinery work. Joinery profiles tend to be large-diameter bits that put significant side loads on the collet. A 1/2-inch shank reduces runout, vibration, and deflection compared to 1/4-inch shank equivalents, producing tighter-fitting joints.

Are joinery router bits compatible with all router brands?

Yes. Shank diameter — 1/2 inch or 1/4 inch — is the only compatibility requirement; the collet accepts any bit with the matching shank regardless of brand. Confirm your router's collet size before ordering. Many Infinity Tools joinery bits are available in both shank sizes.

I'm new to router joinery. Which bit set should I start with?

The Ultimate Joinery Router Bit Set is a strong starting point, covering the most common joint profiles in a single purchase. Reading through the Infinity Tools woodworking blog before your first cuts will also help you understand setup technique and feed rate.

What is Infinity Tools' shipping policy for router bits?

Full details on shipping speeds, costs, and free-shipping thresholds are listed on the shipping policies page.

Joinery