With the same features of our Standard T-Squares, the Non-Slip T-Square has a neoprene non-slip backing that grips better than cork and will not dry out or chip off. The black ABS plastic heads are lightweight and nearly unbreakable. The heads are secured with 5 screws instead of rivets. Available in a wide range of sizes. 12-Inch Drafting T-Square 15-Inch Drafting T-Square 18-Inch Drafting T-Square 24-Inch Drafting T-Square 30-Inch Drafting T-Square 36-Inch Drafting T-Square 42-Inch Drafting T-Square 48-Inch Drafting T-Square The aluminum shaft is made in El Salvador and plastic head is made in the USA. Assembled in the USA. Alumicolor products are made with the highest quality extruded aluminum. All Alumicolor T-squares feature ultra-smooth inking edges with exact calibrations that will stand the test of time.