The SAVAGE Aluminum T-Square is made from 3/16 in. thick anodized aerospace aluminum for the durability and performance you need. The head is secured with 5 steel rivets and offers a 1/2 in. working surface for added stability. The 2 in. wide reverse-ruled blade is standard outlet size with laser-etched gradations for precise measurements in either direction. Its 47-7/8 in. body is designed to allow the square to hang freely on 48 in. material without snagging. This high-performing square will be your new go-to for all drywall work.