The Moore & Wright MW521-01 Combination Set is supplied with three measuring heads (square, protractor and centre) which can be attached to the stainless-steel ruler, allowing versatile measurements and marking on various types of workpieces. The stainless-steel rule has engraved graduations; one side metric, one side imperial with hardened and ground slide ways. Range: 180°.Length: 300mm (12in). Moore & Wright Mw521-01 180 Combination Set Hq 4 Piece 300mm (12in)