Lufkin Tinner's Steel Circumference Rules

• 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