Taytools Large Adjustable Trammel Head Set

These large adjustable clamp-on trammel heads are the perfect tool for measuring, marking, or scribing circles and arcs beyond the range of a standard compass. By attaching them to a custom-length shop-made beam, you can create arcs of virtually any size. The heads securely clamp onto any wooden beam from 1/2" to 1-1/2" wide. Each set includes two trammel heads, both equipped with 4-1/2"-long x .320" diameter hardened, adjustable points that can be swapped out for pencils, pens, or other scribing tools.

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