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 apply pressure, then snap each of these onto the roller bar where there is a gap, and you should be set. Moreover, it is easy to operate without dismantling the machine. Use pliers to snap the ring to the rod if necessary during installation. Replacing the rubber ring requires disassembling the machine, which may risk damage. Rubber roller replacement with retaining rings Compatible with maker/maker 3 10 pcs per pack How to install? Shove the rubber back into place and snap the ring onto the metal rod where there is a gap (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. Color: Black Material: Rubber Package Contents: 1 set x 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 to differ slightly from the real thing. Measurement allowed error is +/- 1-3 cm.