Graf Rapid Mount Screw Replacement KitThe Graf Rapid Mounting System are the replacement screws and nuts for the Ultra 5000 & 3000 Holder. The RMS screw kit allows players to replace or upgrade their holders without the use of a rivet machine. The RMS T Nuts mount inside the skate and the RMS Screws mount the Cobra holder to the outsole. Each package contains 4. What you will need to mount your new Graf holder: Skate Sizes (1. 0 5. 5): 4 X Short nuts screws in the toe4 Short nuts screws