These are the optional 12mm Aluminum Wheel Hexes for the Tekno RC SCT410 Kit, TKRC5500.                                                                                                        FEATURES: Hard anodized CNC machined aluminum construction                                Set screw equipped to avoid losing drive pins                                   Replaces stock plastic wheel hexes on the SCT410                                Also fits all 12mm short course wheels                                          Compatible with the Tekno RC M6 driveshafts for the Traxxas 2WD Slash                                                                         Compatible with Team Associated SC10 4×4                                                                                                              INCLUDES: Four 12mm Aluminum Wheel Hexes, four Shims and four steel Drive Pins and four steel Set Screws