The convenience of adjustable sizing with the safety of a limited range of choke collar action. Limited closure helps to prevent injury to pets.  Collar tightens when a dog pulls on a lead, then relaxes when the pulling stops. Also works to prevent dogs from backing out of their collars. Great for breeds with large necks and small heads like greyhounds.

Provides the convenience of adjustable sizing with the safety of a limited range of choke collar action
Remains loose and comfortable until engaged; contracting to prevent escape; Ideal for training.
Fits necks 14" to 24"