With rack units, one of the biggest issue is reaching inside to run various cables. Whilst 3/4" jack and XLR already have standard D-Type sockets, USB, Firewire, and D-Sub never really did. That was till Neutrik came along with a range of great D-Type data connectors, and this one is no exception.
The USB-W is a reversible A/B adaptor housed in a D-Type suitable enclosure. It's screw attatched, and the external metalwork has a grounding pin, allowing for it to be connected to a chassis ground, however this is optional so if your cables run as a 4+Ground setup, you dont have to worry about it interfering with the data.
It's a robust connector, durable, and will happily suit any requirments for a D-Type USB connector.