Koh-I-Noor 45 degree set square is made from smoky transparent polystyrene. The scale printing is resistant to wear and tear in normal use. The set square has the added benefit of a protractor cut-out centre. A two in one set square and protractor for convenience and also avoids the problem of lost protractors. Set Square = Lenght: 250mm, Hight: 18 Set Square = Measure: 160mm (not dead lenght) Set Square = Depth 2mm (with lip) Protractor = 100mm
