Vintage Trammel/Caliper points with significant advantage for large arcs

• The heads will accommodate any size beam from 5/8" to any width required for rigidity. Widths wider than 7/8" require saw cuts on each side of the boom.
• Points are 7 1/2 inches long.
  
• Points are elliptically ground for easy minute adjustment.
• Caliper legs are 9 1/2 inches long.