Rob Cosman's IBC Mortise Chisel: 3/8 inch

It's square!

Most mortis chisel manufactures taper the sides of their chisel to prevent "binding". Rob's chisels are square, as they should be, which makes them more precise. I'm also diggin the IBC steel. When used properly, binding is not an issue. I love mine and just ordered the 1/2" for a new project.

3/8” mortising chisel

Great chisel. Just what I needed for deep mortising

Excellent tool. The design and manufacturing quality are first rate.