Copers attach to your truck hangers to make grinds even faster like rails for your trucks 3980s throwback stylecreature is proud to offer a very limited amount of skeleton key mfg master grinderswe included or navarrette included a signed creature sticker in every package navs had this to say grinders copers call them what you will they are part of skateboarding past a part that made skateboarding what is is today some say grind like a man we say lay sod like a man we are s