Starrett Trammel Points (50 Series)

Trammel points are used to measure the distance between points that are too great to be reached with dividers. The heads are die cast with black wrinkle finish and have hardened, forged steel divider points. The points screw into the heads, and the pencil socket accompanying each set of trammel heads can be used in place of either point. No. 50A has an adjustable point so that you can roughly clamp the heads on the beam and then precisely adjust their position. You can use trammel points like a giant compass to make big arcs or to mark fixed lengths. A stub of pencil with the eraser cut off fits into the included pencil socket (pencil not included). The standard set of points is 3″ long but longer points (5″/125 mm) are also available. A beam is not furnished with these trammels. The heads will accommodate a beam up to 3/8″ (9.5 mm) thick and 3/4″ (19 mm) wide