A trammel is used with a beam to make up a beam compass. These tools are typically used to scribe a circle and radius. It can be adjusted by sliding the metal across the wood and locking it in place. Choose from our extensive selection of trammels for all your measuring and layout needs at HomElectrical.
A trammel is usually used when you have to draw a big circle or arc that cannot be handled by a regular compass. Some of these trammels can be used with a beam to make up a beam compass.