When it comes to CNC machines, your SureFine has screws on its axes, and the Bodgeport does too. A shopbot has an amazing rack gear system, but when you start to dig into the small CNC routers ...

You pretty much always need keys, but it's often nice to have a few tools on hand, too. The VersaLink allows you to carry some of both in one modular, magnetic, titanium-bodied device.