Most expensive of Tormek's optional jigs, and well worth it, is a fine Jointer & Planer Blade Jig. It comes with its own adjustable tool rest and 12" knife holder. This Tormek jig handles any machine knife 5/8" or wider, in virtually any length; knives longer than the holder can be repositioned to sharpen additional length at exactly the same setting as the first 12". Fits Tormek Supergrind or Tormek T 7 Sharpening System.