The Woodpeckers Precision Triangle Set is an essential tool for precision woodworking. It consists of two sizes: a 4-inch and a 6-inch triangle. These triangles are CNC-machined from cast and ground tool plate aluminum, which is the most stable aluminum on the market. With no shoulder, they lie flat in the bottom of boxes and cabinets, making them ideal for checking squareness. You can also use them on your table saw to set your miter gauge perfectly. Laser-engraved scales run along the perpendicular edges, allowing you to measure in two directions from the same zero point. The scales are graduated in sixteenths, with primary divisions for easy reference. When you buy the set, the triangles nest together with three brass knobs, creating a combined tool with a nice heft. Additionally, the set includes a wall-mountable MDF case to keep your Precision Triangles safe and ready for work.