This is a top-of-the-line Flow Control Tap. On the side of the tap is a lever, when adjusted it allows full control over the speed of flow. Once set you can leave it as is until something in your system changes (like beer style or the temperature you are pouring at)
Flow Control is a great option when selecting a tapping system to be mounted directly on top of the keg. In a bar the tap is far away from the keg and connected by meters of beer line, this slows the flow of beer which reduces foaming by the time it reaches the glass.
The flow control tap does the same thing by slowing the flow of beer at the tap using a lever on the side you can adjust as needed to get the pour right.
This eliminates the need for long beer lines and will restrict the flow directly on top of the keg, pouring a great beer every time.
Either get the tap alone to connect to your existing gear (tap shank adapter, shank or font) or get the tap shank adapter and either a steel or plastic liquid disconnect to attach to liquid ball lock posts on a keg or pressure fermenter (as shown in the other pictures).