Johnson Level 12" Structo-Cast Rafter Square w/ Built-In Scribe Notches

The Johnson Level 12" Structo-Cast Rafter Square is made of durable, lightweight Structo-cast, high impact molded frame. This rafter square speed the job of angle layout. The thick edge makes an excellent right angle guide for a saw to run against. It can also be used in squaring lines, square cutting and line and angle marking applications.