Standard T-Squares - Features shatterproof ABF plastic head and 1.5 in wide tempered aluminum shaft calibrated in inches and centimeters. Photo-anodized calibrations are a permanent part of the aluminum and will never fade or rub off over time.
Professional T-Squares - Alumicolor has a full line of Professional T-Squares with a 2 in wide extruded aluminum blade. Calibrations are made using Alumicolors photo anodizing process giving all our products a smooth, tick-free finish that will not wear.
The black ABS plastic heads are lightweight and nearly unbreakable. The heads are secured with 5 screws instead of rivets. Unlike the Standard T-Square, the Professional aluminum blades have channeled backs that glide easily on drafting tables.