The ALPHA LOCK is a PATENTED, 10 year, market proven ANTI-THEFT mechanical wheel-lock designed to protect and secure: cars, trucks, trailers, RV's, construction/towable equipment. It is also used by Government Agencies for PARKING and LAW ENFORCEMENT The product weighs less than 10 lbs. and installs in 5 -10 seconds!. The ALPHA LOCK is currently sold by more than 3,000 US dealers and in 15 countries worldwide, Exclusive CANADIAN territories are now available.