Ever since the first Lufkin wood rule was produced in 1869, the Lufkin brand has been synonymous with high quality and unmatched accuracy, which you can see with the Lufkin 20 oz. Plumb Bobbrass Inage. Today, Crescent Lufkin wood rules, power tapes, engineering and surveying tapes, specialty tapes and measuring wheels comprise one of the widest selections of measuring products available from any manufacturer. With a cylindrical shape and tapered point tip, this bobbrass inage is designed to be easy and convenient use.