Weems & Plath Dual Bar Beam Compass
This aluminum channel beam compass with graduations in both inches and millimeters includes two 13" beam bars and one coupling. The maximum arc/ diameter that can be drawn with this compass is 51.5 "(140.97cm). This specialized compass can be used to transcribe large circles/arcs or transfer measurements on large charts or technical drawings for wood or metalwork projects. A molded storage tray holds all the components in place when not in use.
