Alvin English/Metric drafting scale ruler. Extremely popular, this budget-priced 12" triangular combination scale is recommended for scholastic and vocational use. Made from satin-finished, white impact plastic with tapered edges and black easy-to-read printed graduations that won''t rub off. Graduations: full size 50ths & 16ths; 1/2 & 1/4 size; 1/4 & 1/8" = 1 foot; metric 1:50 and 1:100. Alvin 120PC combination drafting ruler is made in Germany.