Great Neck Saw 10440 24" Aluminum Rafter Square:High-grade special aluminum alloyFeatures rafter tables, brace table, Essex table, octagon scale and hundredth scaleFace graduations in 10ths, 12ths and 16thsSatin finish with filled impressed numeralsGreat Neck square's body length: 24" x 2" Tongue length: 16" x 1-1/2"