Kits for assembling land vehicle structural parts comprised primarily of structural tubular components used in the assembly of roll cages, chassis, and frame members and tab locators in the nature of positioning devices being part of the structural, tubular components and used for assembling the tubular components into roll cage, chassis, and frame members for all-terrain vehicles (ATV) and utility terrain vehicles (UTV); land vehicle structural parts for all-terrain vehicles (ATV) and utilit...