D-Unique Tools Universal Square Hand Tool - This is a wall partitioning layout tool. It is a carpenter tool that saves 70% of layout time. Whether you are a professional carpenter or a do-it-yourself remodeler, this tool can become your most helpful tool. It's a pro's tool that can help you get professional results in less time with fewer mistakes. It is designed to aid in laying out wall studs (both middle partition and corners), squaring windows and doors, and scribing angles, rafters and seat notches. *Designed for all conventional lumber *Transfer anchor bolt location to the sill plate *Hold chalk line and tape measure to aid in layout *Simplifies the seat cut *Two pivot points for rafters and angles *Scribe 2x4's for ripping in half *Saw guide for circular saw