128°

128° retractable eraser is designed to address issues observed with traditional roller erasers for children. Existing models are often too short, and the roller’s limited angle causes wrist discomfort during use. The designer studied children’s arm and wrist movements when using roller erasers and developed a 128-degree curved design for better wrist support. The eraser’s width and height were also increased to 3-4 cm, enhancing the overall user experience and aligning with ergonomic principles for children’s grip.