Why it?The maker has an issue (on some units) where the rubber rollers on the paper hold down bar will move from the edge of the cutting mat. This will cause the cut to fail. What to do if the maker rubber roller rolls off the track?You do not need to replace the rubber rollers on the machine, these C clamps can help hold the rubber in place. Shove the rubber back into place and something that can put pressure on it, and then snap each of these onto the roller bar where there's an and you should be ! What's more, easy to operate without dismantling the machine. Use pliers to snap the ring to the rod if necessary during installation. But replacing the rubber ring requires the machine to be disassembled in a disorganised manner, which can easily damage the machine. Rubber roller replacement for - Retaining Rings Compatible with for maker/maker 3 10pcs per pack How to install? Shove the rubber back into place and snap the ring onto the metal rod where there's an (on the moving side of the rubber). Use pliers to assist with installation if necessary, it is not small but deliberately sized to prevent deflection of the rubber. Colour:Black Material:rubber Package Contents: 1 set x for rubber roller replacement Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.