Blaylock DL-80 Cargo Trailer Door Lock - 3-Pack of Keyed Alike Locks Heavy-duty aircraft aluminum  will not rust. Convenient push-button lock - Two tubular keys with each lock. Hardened plated steel pin. Perimeter gasket to eliminate scratching and vibration noise. Covers the keeper hole used with regular padlocks. Covers the bolt head at the top and bottom for added security.