●Material: This Heavy Duty Combination Square blade is made of high quality durable and rust proof stainless steel. ●Size: This Carpentry Square is 12 inch long and the blade is Marked with Precise inch. ●Widely application: This Combination Square Set is great for marking 45 and 90 degree angles, and can also function as a handy gauge for transferring precision angles and other measurements; essential for use in your rafter, deck, stair and roofing projects, and in other general carpentry operations. ●This T ruler allows you to do quick and accurate marking and measuring.