*Engineered for speedy coupling and uncoupling.To lock-push in;to unlock-give the coupler sleeve a 1/3 tur Designed to protect against accidental uncoupling. *A variety of port configurations are available to meet specific needs. *Standard Twist-Lock couplings are ideal for low to medium air flows,such as air tools. *Standard Seals are Buna-N(Nitrile). *Constructed of Zinc bodies and Zinc plated steel sleeves and nipples. *Interchanges with Schrader Twist-Lock style couplings.