Made of Rosewood. Head has inlaid brass wear strip and locking knurled knob screw. Beam has single pin scribes on one side and a fixed pin and adjustable pin on other side fitted to brass strips. Fixed pin side adjust to 6" max. Double pin side adjusts from 3/16" spacing to 6".
Adjustments are made using a rule - no graduated markings.
Made in England by Crown Tools.