A general purpose combination square set for workshop or maintenance use. All heads are manufactured from cast aluminium and are enamel finished.,Rule: 305mm/12in. steel rule with etched graduations. Subdivided 1/16in. on 1mm on channel side, 1/32in. and 1mm on plain side.,Square head: Includes 45° mitre face, spirit level and 40mm long steel scribe.,Mitre head: Locates centres in cylindrical surfaces.,Protractor head: 0 - 180° scale in both directions graduated every degree. Incorporates a spirit level on rule plain.