Infinity Tools Squared Corner Chisel

It squares up the rounded corners left by a router bit when cutting hinge, lock, and hardware mortises, so the hardware seats with crisp 90° corners. See more chisels and gouges.

Set the chisel into the routed corner so its two cutting edges align with the mortise walls, then strike the top with a mallet. One firm tap cuts both walls square at once.

It has a 3/8" square hardened steel cutting blade, which suits typical hinge and hardware mortises. Press and strike to produce a clean, square corner.

The cutting blade is hardened steel for durability and a long-lasting edge. Keep it sharp with our sharpening stones and accessories.

Yes. The corner chisel is struck with a mallet to drive the cutting edges into the wood. A wooden or dead-blow mallet works well. Browse our hand tools.

Very much so. Squaring router-cut hinge mortises is its primary job, making it a go-to tool for door-making and hardware fitting.

Yes. While it's most often used to square router-cut mortises, you can also use it to clean up and square corners on hand-cut mortises and recesses.

Hone the cutting edges periodically on a sharpening stone, just as you would a bench chisel. See our sharpening supplies for stones and guides.

Yes. Any routed mortise that needs square corners, including lock, latch, and strike-plate recesses, can be squared with this chisel.

You can, but a regular chisel squares one wall at a time and is easy to misalign. The corner chisel registers in the corner and cuts both walls square in a single strike for faster, more consistent results.