Review on Premium Woodworking Square: Exceptional Mortising Countersink Tool for Industrial Power & Hand Tools by a Skilled Woodworker by Larry Daniels

So if you know anything about working with wood, you end up needing a set of square bits to make your grooves with. For me, it fits right into the drill press with no problems. I added some oil because they looked a little dry but once I started working they were very good and got the job done with no problems.