Strong Magnetic AttachmentWith a magnet on one side, this cute eraser saves space and hassle of storage, just attach it to any metal surface, the strong magnet holds the eraser firmly. UserfriendlyNo sprays or detergents required, the thick felt allows this eraser to cleanly and easily wipe and remove any marks or ink left by pens and crayons without having to wipe hard. AND the contoured design fits seamlessly for hand grips to make precise erasing Extended LifeThe thick felt also prevents residue from whiteboard pens from accumulating over time; In addition, durable and reliable felt can be washed repeatedly, which greatly extends the product's service life. Multiple SurfacesCan be used on all glass, painted steel, porcelain, melamine and other dry erase board surfaces standard whiteboards, calendars, memos, marker boards, rolling, classroom calendars, easels, wipe boards, would not damage the surface material. Quality MaterialLight weight 30gpiece, practical size 9.5*8.5*2CMpiece, environmentally friendly, nontoxic, no odor.