Derwent Rechargeable Precision Eraser < li>Superfine eraser perfect for erasing fine lines in detailed artwork and technical drawings. < li>Clear accurately and quickly. < li>Incorporates a built-in 50 mAh lithium-ion battery that is recharged by USB.< / li > Long life load. < li>Includes USB charging cable and 20 spare erasers: - 10 thin erasers of 5 mm diameter< / li > - 10 extra-thin rubber bands 2.4 mm diameter < li>The function button is designed to turn on and off when needed, allowing the hand to hold freely for maximum control. < li>Suitable for left and right hand use. < li>Non-abrasive with circular motor movement. < / ul> < li>Brand: Derwent