100cm ABS Teaching T Square Ruler With Handle. This 100cm ABS Teaching TSquare Ruler is designed for accurate drawing, drafting, and classroom demonstrations, ensuring perfectly straight lines and precise angles every time. Made from environmentally friendly, nontoxic ABS, it offers excellent durability, toughness, and resistance to deformation, making it ideal for longterm use in busy teaching environments. The smooth, burrfree surface protects hands and provides a comfortable drawing experience, even during extended lessons. A builtin ergonomic handle allows for easy positioning and stable control on whiteboards, paper, and teaching surfaces. At 100 5.3 cm with a sturdy 4mm thickness, it withstands multiple drops without damage. A reliable and professionalgrade tool for math, engineering, geometry, and technical instruction.