4Pcs Tire Air Chucks 1/4" FNPT, Anti-Leakage Lock on Air Chuck Quick Connect, Heavy Duty Brass Locking Air Chuck Tire Inflator for RV Car Air Compressor. Upgraded Strong Sealing & No Air Leakage: Locking tire chucks adopts a professional leak proof lock design, with a check valve inside, which can be firmly locked onto tire air valve and is not easy to slip off; We have specially equipped sealing tapes for you, greatly enhance sealing performance, effectively preventing air leakage, and improve work efficiency.