Precision Trammel Set

The Precision Trammel Set attaches easily to a large rule or yard stick for expeditious marking of arcs and circles. The set includes two scriber points and two pencils points, with storage in the body. The steel features a reversible point for safe storage within the body. -Features & Benefits : Will accurately transfer measurements, scribearcs, and lay out circles too largefor conventional compasses Will fit any scale, 1/2" to 1-1/8"(13 to 29mm) wide Two scriber points and two pencil pointsincluded Up to four points can be stored in body Free-wheeling thimble for greater precision Aluminum knurled body Steel collet holds replacement leads,scribers and crayons Points reverse into body for safety Ruler not included in set