36" Steel Circumference Rule This is a brand new 48" circumference rule. Blade Width 1 1/4 in Blade Thickness 1/16 in. Material Steel Product Features: Standard rule with tinners and other sheet metalworkers Tempered medium-weight steel Hole in one end for hanging Markings are black for easy reading One side upper edge marked inches to 1/16ths Lower edge marked up to 150 circumference inches to 1/8ths Reverse side has formulas for calculating circumference, diameter, area Size tables for laying out measures and cans