Speed square combined with built-in acrylic block level. Made of lightweight plastic. Combines features of the framing, try, miter, and protractor square as well 8″ level. Full 8″ long, extra wide T-bar for accurate 45 deg. and 90 deg. angles. Use just 1 number for all rafter cuts. 3/16″ edges, 8″ x 8″ x 11″ size. Color: Gray. Instructions included.