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.