Swivel Base for Tormek Sharpener RB180. This Handy Rotational Base Fits the T-7, T-4, T-3, and Super Grind 1200 and 2000 Sharpening Systems Fits T-7, T-3, S2000 and S1200 models Constructed from a sturdy, low-friction polymer Easily change from sharpening to honing Low profile does not substantially affect the working height of the sharpener