This eraser has 45 corners. Even if you use this, the corner will appear again and again. Easy to erase small areas. It's a high quality plastic eraser that ensures you always have a fresh corner to use for controlled erasing. 2×0.7×0.6inch (50×18×16mm) SUN-STAR Multi-Angle Eraser Zig Zag EverSharp Precision Point for Detailed Erasing Black, 1Pack