Doyle Scale Rule used by scalers and cruisers to determine footage of saw logs. Black graduations on white wood with brass fittings and folding hook. 5/8" x 48". Folding Doyle Scale Log Rule 0524$12.95, 6/$71.70, 12/$138.00 Need more information? Please feel free to contact us at 1-800-592-6940 - Ask for Extension 547 or Internet Sales.