Strong cast aluminium body with clear, embossed imperial graduations and common rafter conversion table. Lipped edge for secure locating. Protractor scale 0-90°. Use as saw guide for angle measurements and cuts. Weight 125g. Overall dimensions: 185 x 185 x 260mm. Strong cast aluminium body with clear, embossed imperial graduations and common rafter conversion table. Lipped edge for secure locating. Protractor scale 0-90°. Use as saw guide for angle measurements and cuts. Weight 125g. Overall dimensions: 185 x 185 x 260mm.