Johnson J48 Measuring Rule, SAE, Aluminum, 48 in L             Durable and accurate, Johnson's 48 in heavy-duty aluminum straight edge features screened, thermal-bonded graduations in 1/8 in and 1/16 in that are bold and easy to read. And its clear, protective anodized finish keeps it protected from wear and tear. The straight edge also features a hanging hole for convenient storage.