You can buy a Hammerlock (I have one) at Boat Center on US1 and SW 183rd St in South Miami. It is a great device but many a boat has been stolen with the Hammerlock simply being dragged down the road. Alot of guys use them down here when they leave their trucks and trailers in the lot either over night or for a couple of days for a Bahamas trip. They steal the trailers Hammerlock and all. They are good but not going to really prevent the pros from being successful. Harry