Deluxe Model Railroad Reference Ruler 300MM

Constructed of 31cm (12 1/2") long non-glare gold anodized aluminum with black calibrations in N, HO, O and G (1/24) scales, 64th and mm along with a guide for converting decimal equivalents to drill sizes for small screws. The black photo-anodized calibrations will not fade or chip when cleaned with solvents.