This eraser has 2 diameter refills, you can choose one of them according to your needs for highlight of drawing or school assignment. A good helper of offices, drawing, drafting and homework.Lightweight and portable, easy carry in you pencil case. Professional Electric Pencil Erasers for Artists, Students, Teachers, Kids and Adults. You can't miss it. Install battery 1.Rotate anticlockwise to open the battery cover. 2.Install two AAA batteries according to the positive and negative marks. 3.Rotate clockwise to close the battery lid. Operation .Press the button and the eraser starts to rotate. Rotate back and forth to erase all the place you don't need. Eraser Options-Thin(2.3mm) and Thick(5mm) Thin and thick erasers create different highlights. Please make sure that φ2.3mm eraser is put into the plastic clamp and φ5mm eraser is put into the metal clamp. Replace the eraser After the rubber is used up, pull out the rubber clamp. Then pull out the eraser about 3mm. 3.Back to the original, you can re-use. Material: plastic Size: 166x15mm Color: Black Power: by 2 x AAA batteries(not included) Packing list: 1 * Electric Eraser 12 * Big Eraser Refills(φ5mm) 10 * Small Eraser Refills(φ2.3mm) 2 * Plastic Rubber Clips
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