Rafter Square, Steel, 24 x 16/ TONGUE LENGTH: 16.000 INCHES BODY LENGTH: 24.000 INCHES NOMINAL DESIGN TYPE: ONE-PIECE BLADE EDGE SMALLEST GRADUATION UNIT: 1/16 INCH AND 1/12 INCH AND 1/10 INCH AND 1/8 INCH INSCRIBED REFERENCE TABLE: ESSEX BOARD MEASURE, OCTAGON SCALE, BRACE SCALE, AND RAFTER TABLE SPECIAL FEATURES: BLACK FINISH; YELLOW MARKINGS MATERIAL: STEEL