The KingLok (B Lock) adaptors/quick disconnects are compatible with Andale (Snaplok), Lancer Pacific (Fatlock) and other brands of draft beer quick lock fittings that are often seen in commercial pubs and bars. 

These KingLok Female x 5/8 Female are designed to fit to  5/8 keg couplers 

These KingLok couplers are designed to be a dry break so when you disconnect the male side the flow is cut off.

Note: does not include coupler