Rust Prevention Kit: Don't let your classic rust away. The Complete Rust Prevention Package includes the right tools and enough product to thoroughly rust proof your car. This kit includes the Undercoating System (16003) with 3 wands and tips to apply undercoat and anti rust in difficult to access areas, the Unibit (16003B) allows access so the Undercoating Gun can treat door, and rocker panel areas where access holes don't exist, the Pack of 25 Plugs (16004) seals any drilled holes, 3 quarts of HD Anti Rust (16017ZP) coats internal surfaces while the 3 qts. of Rubberized Undercoating (16008ZP) coat wheel wells