Electric Eraser, izBuy 2 Pcs Eraser Kit 2 AAA-Battery Operated Precise Pinpoint Erasing Machine for Artist/Draftsman/Animators/Architects,Fantasy 20 Pcs Original Eraser Refills Included,Blue (8301) Cordless, Compact and Lightweight - Offers precise control and ideal for drawing, drafting, architectural plans, arts and crafts. Battery operated eraser - Just install 2 AAA batteries & follow the directions & it will work like a charm. One-button Operation - Simple push of the button and a light touch are all that's required to remove marks,without even having to go over the lines twice. Long-lasting & Refillable - Easy to remove and replace. [10 eraser refills are included] Adjustable eraser head - The length of erasing head can be adjusted,(usually 3mm is the best)with the innovative design of metal holder,which can made it use longer and saving time of replacement.