TANGLE-FREE TURBINE TOOL
The Dyson Tangle-Free Turbine tool has two counter rotating brush heads and is designed to ensure thread, hair, string, etc do not get tangled in the heads. This tool is Dyson's answer to traditional pet tools with a brushroll. The traditional tools have a tendencey to get their brushrolls tangled with long debris, and as a result they can bog down and often need cleaning. This can be a hassle as some brushrolls are hard to access. Dyson's video (shown below) highlights what the Tangle-Free Tool looks like and how it works.
Following is a Dyson video showing their Groom Tool in action. This is a short 45 second video but it gets the message across.