The Lufkin Folding Log Rule - Doyle Scale is used by scalers and cruisers to determine footage of saw logs.
Black graduations on white wood with brass fittings, the Lufkin Folding Log Rule - Doyle Scale also features a folding hook.
5/8" x 7-1/2" long folded. 48" long opened.
Doyle Scale volumes for 10' and 18' logs on one side.
12', 14' and 16' logs on the other side.
Lufkin Folding Log Rule - Doyle Scale - Graduated inches to 1/16" on lower edge