Molded plastic 12 in. triangular scales in boxwood color. High quality impact plastic withstands chipping and breaking. Machine die-engraved graduations resist wear/rubout. Colored furrows for quick scale selection.

NOTE:Unless otherwise specified, triangular scales are 12 in. English or 30cm metric with divisions according to the following standard graduations:

ARCHITECT’S: 3/32, 3/16, 1/8, ¼, ½, 1, 3/8, ¾, 1 ½, 3 in. to the foot; one edge divided to 16ths.

MECHANICAL DRAFTSMAN’S: 1/8, ¼, ½, 1 in. to the foot; ¼, ½, 3/8, ¾ size, 16ths and 50ths to the inch.

ENGINEERS: 10, 20, 30, 40, 50, 60 parts to the inch.