RV Camper wheel tire chock Fits even the tightest of wheel retracting down to 3”and extends to 12" Use for camping trailer, camper, RV Provides added stabilization and prevents tire shift by applying an opposing force to the two tires Each box contain two wheel chock scissor stabilizer, weight 10lb, made by high-quality steel The enhanced rust-preventative treatment allows those chocks to withstand a wide variety of weather from coast to coast