Aluminum top clamps the X4 bulkheads. Machined to house the aluminium caster inserts. Mounts on the reduced bulkheads with especially made centering lugs, for optimum consistency concerning the caster setting, alongside basic maneuvering. The top clamps work 1mm milled grooves the ball-bearing hubs. Top of the clamps happen milled to get rid of unneeded product to scale back their size and fat. The screws arranged from base for the caster inserts capture the inserts in top clamps in order to avoid them from coming free while servicing the automobile. The screws also act as the top arms pivot ball mounts, reducing just how many elements in put up and reducing fat. The surface of the clamps and caster inserts are produced from premium Swiss 7075 T6 aluminum and black colored colored anodized.