Draw a circle, arc, or straight line the fast and easy way with the beam compass. No measuring or ruler needed. The built-in locking tape rule makes set up a breeze. Gauge slides along work for edge marking. The beam compass allows you to draw a 3-1/2 inch to 72 inch radius.
With adjustable mounts, these trammel points attach to various beams to createcompasses of any length. Great for layout, marking, measuring and drawing any sizecircle or arc especially when conventional compasses aren't big enough. Includesfine-tipped needle points and #2 pencil lead for marking.