The Swanson Tools 7 inch Speed Square and 25 foot Savage Proscribe measuring tape kit is built for maximum convenience. The Speed Square is a triangular-shaped, carpenters’ layout out tool which combines some of the most common functions of a try square and framing square into one. It is used to make basic measurements and mark lines on dimensional lumber and may be used as a saw guide for making short 45 and 90 degree cuts. The Speed Square is 5 tools in 1. Try Square, Miter Square, Saw Guide, Line Scriber and Protractor. The SAVAGE ProScribe quickly transfers radius or straight lines. Edge allows for no sliver straight line scribing. Grips metal surfaces with magnetic tip. Ideal for contractors and builders. Easy to use blade lock hold tape in place. Nylon sleeve protection. Includes 44-page Swanson Blue Book.