The Tormek Universal Support with Micro Adjust is the bar every Tormek jig mounts on, in two versions: the US-103 for the T-4 and the US-105 for the T-8.
The Micro Adjust lets you set the sharpening angle and depth quickly and accurately. The thread is trapezoidal with flat tips, so the locking knob won't damage it. The US-105 is made from 12 mm (0.47 in) round steel and fits the T-8, T-7 and Tormek 2000. It's also the way to add Micro Adjust to an older machine for the TT-50 Truing Tool.
Engineer Torgny Jansson founded Tormek in 1973 to build a modern version of the old Swedish water-cooled grindstone. The name is short for Torgny's Mekaniska, and the very first model was driven by an electric hand drill. Tormek is based in Lindesberg, Sweden, where all of its product development, engineering and production still take place.