BOLT Lock 7018447 Receiver LockTrailer Hitch Pin LockReceiver LockReceiver Lock; 5/8 in.;FEATURES:Opens With Your Vehicle Ignition KeyEliminates Extra Keys on Your RingStainless Steel 5/8 in. Diameter ShaftDouble Ball Bearing Locking MechanismPlate Tumbler Sidebar To Prevent Picking and BumpingStainless Steel Lock Shutter To Keep Out Dirt And MoistureFits Class 3 And 4 And 5 HitchesLimited Lifetime WarrantySTRATTEC Security Corporation is the worlds largest manufacturer of automotive locks, keys, and related access control products, and is the primary lock supplier to Ford, GM, and Chrysler. STRATTECs history in the automotive business spans 100 years.