Features: for Triangle Ruler: Machinist Engineer Square with aluminum handle that is a durable tool for measuring, cutting and drawing aid. It is important for every roofer, professionals, and DIYer Superior Quality: Made of hight quailty stainless material, not susceptible to rust and decay; It is convenience and simple to maintenance. Humanized Design: Aluminum alloy handle makes you feel comfortable and easy to carry and operate; Calibrations are clearly marked; The scribing is easy and precise. Thick base: it is a hands-free operation to stand the for triangle ruler upright to check work;The inside edge of the of the square's handle features a shoulder to allow it to lay flat on the work so you can accurately mark either edge of the blade Excellent for carpenters, construction professionas, roofer, and DIYers. Specifications: Material: aluminum alloy Size: 12cm, 18cm/4.72in, 7.09in Note: Please allow 0-1cm error due to manual measurement. Make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 Pcs carpenter square