The Rockler precision miter gauge has an aluminum head with a scale ranging from 0 to 70 degrees in both directions, plus positive stops at 0, 15, 22.5, 30, 45 and 60 degrees. A spring-loaded stop locks into the notches that create the positive stops, and a machined hairline indicator makes it easy to set other angles. The precision miter gauge's 18-inch steel miter bar works in 3/4 x 3/8 inch standard and T-slot miter slots.