M-Power Tri-Scribe Flat Lying Trammel Head Set

Tri-Scribe - Convert a common shop rule or square into a marking or mortising gauge, or compass

Tri-Scribe: This versatile flat lying trammel head set includes two heads that will attach to nearly any metal rule, combination, or try square. Strike perfect arcs, circles and parallel lines, or use it as a marking gauge. Attaches to any metal rule or square blade up to 3/32" thick, and less than 2" wide. Set includes: 2 metal trammel heads, wo steel scribes, and one Tri-Blade Accessory pack per set.

Available at Hartville Tool