[Optimized function]: Scale laser calibration, clear, accurate and wear resistant. Durable cast zinc body, rust proof stainless steel blade [Accurate Measurement]: The exclusive carpenter square allows you to quickly and accurately ensure square and level marking and measuring in a vast array of applications [Multi-tool]: set can be used as a square, depth gauge, scriber, and a level[Multi-tool]: set can be used as a square, depth gauge, scriber, and a level [Applications]: Great for marking 45 and 90 degree angles, and can also function as a handy gauge for transferring precision angles and other measurements [Must-Have Gadget] Essential for use in your rafter, deck, stair and roofing projects, and in other general carpentry operations