Magnum Expandable Wheel Lock by Rack 'EM - RA-25K (keyed Alike)

Good visual deterrent and deterrent for a thier that doesn't have much time or tools. Made fairly solidly but, a good crowbar would make short work of it if you had the time. This works in combination with wheel lug locks, otherwise they will just replace your tire. Good enough to make the thieves possibly look elsewhere.