Roller Derby 908G Inline Skate Brake Stopper Roller Derby 908G inline skate heel stopper/brake parts Grey stopper approved for use in most skating rinks Fits Roller Derby models:I276 BX 4000, I279 BX 6000, I280 BX 7000, I278 BX5000, I256 MONTEGO, I286 RETRO 500 Attaching screw goes through the side.