Description
UNIQUE FEATURES
• Corners notched for resting on frame rim
• Designed for both right and left hand users
• Protractor for measuring pantoscopic angle
• Coloured bridge centration grid for accurate frame alignment
• Easy measurement for box DBL sizing
• Box DBR rule
• Quick left and right BVD measurement
• Easily read figures and markings
• Top pocket size
• Sloping/wedge edges
Each Billings PD Ruler is supplied with an informative user guide available to view here