Professional-quality Alvin 244P mechanical drafting scale is made from high-impact plastic with white, non-reflecting, matte faces and tapered edges. Machine-engraved graduations and color-coded furrows. Both architect's and engineer's graduations: 1/8, 1/4, 1/2, 1-inch to the foot; 1/4, 3/8, 1/2, 3/4 size; 50ths and 16ths. Supplied in hard plastic case. Quality-made in Germany.