Professional drywall t-square features anodized aluminum finish to resist rust and corrosion. Large, bold numbers and graduations allow for quick identification of measurements and the patented rivet design ensures squareness over time. Heavy-duty 3/16 In. thick t-square is specifically designed for the drywall professional. No. 418-48: Length: 48 In., Measurement Type: English, Graduations: 1/8 In., Material: Aluminum, Pkg Qty: 1, Package Type: Card