The Project Kics Heptagon Caliber 24 Lug Nuts features a unique heptagon shape. Even if a thief has a full set of socket wrenches they won t have the unique 7 sided socket to fit. Heptagon Caliber 24 Lug Nuts come in M12x1.50 or M12x1.25 and uses a 60 degree seat with a Blue Titanium coating. Heptagon Lug Nuts are sold in packages of 20 lug nuts can come with the special Heptagon 19mm/21mm adapter.