Product Details: Standard rule with tinners and other steel metalworkers Tempered medium-weight steel Hole in one end for hanging Markings are black for easy reading 954 model, one side upper edge marked inches to 1/16ths Lower edge marked up to 150 circumference inches to 1/8ths Reverse side of model has formulas for calculating circumference, diameter, area, etc. and size table for laying out measures and cans
