My dad bought some for the garden recently but having looked at them in detail as far as I can see there is no benefit to using them and indeed there would be some downsides to using them. There is no shut off mechanism on either side, there is no locking mechanism so if you caught one of the lugs and the fitting twisted it would come undone and they would only be suitable for in-line connection for 1/2" hose to 1/2" hose, a connection that not many of us need.