Dissatisfied with twin screw vises on the market, Colorado-based woodworker Andrew Klein designed and built his own. Klein's innovative design uses metal gears to provide two different speeds, gearing the screw rotation speed up or down. There's also a "neutral" between the speeds, for times when you clamp something and the handle is in the way; by placing it in "neutral" you can rotate it to wherever you like while maintaining the clamping force.
The gearing feature makes the vise action fast, giving the tool its name: The Twin Turbo Vise.
Today Klein sells a refined version of the vise on his website, in three different sizes: A 14" for $310, $20" for $325 and a 24" for $350. (Note that those dimensions are the distance between the screws.)