Drywall T-Square, Aluminum, 54-In. Door Hinges The heavy-duty aluminum backer plate

The heavy-duty aluminum backer plate provides rigidity and is well balanced for ease of use

High-Flow - 35% More Flow for Optimized Performance for Sprinklers & Nozzles

Calcium hardness increaser made of calcium chloride

Fiberglass

Drywall T-Square, Aluminum, 54-In. Door Hinges The heavy-duty aluminum backer plateTake errors and guesswork out of your next drywall job with this heavy duty 54" T square from Johnson. Its extruded aluminum blade and head are a robust 3 16" thick, creating a safer straight edge that prevents your utility knife from slipping, while its clear protective anodized finish will keep your tool safe from rust and corrosion. The JTS54HD T square features a unique rivet assembly that permanently bonds the head and blade, so that it stays