Why SG-200 Original Grindstone? All-round grindstone with adjustable sharpening characteristics equivalent to between 220 and 1000 grit. Long service life, often lasts many years. Can be trued with the TT-50 Truing Tool to regain a perfectly flat surface. Can grind most steel grades. Fits the Tormek T-4, Tormek T-3 and older models with a grinding wheel 200 mm (7 7/8″) in diameter and 40 mm (1.5/8″) wide. All-round sharpening for professionals and amateurs. The SG-200 Original Grindstone is the perfect all-round grindstone. The grit can be adjusted between 220 and 1000 grit with the SP-650 Stone Grader. This makes it excellent for both coarse and fine sharpening, and it easily sharpens most types of tools and steel grades. The SG-200 Original Grindstone is supplied as standard with the Tormek T-4 Original. And Tormek T-4 Bushcraft. It’s also available for the Tormek T-8 Original and Tormek T-8 Custom, but with different dimensions as the SG-250 Original Grindstone. The TT-50 Truing Tool allows you to remove the very top layer of the grindstone to restore a perfectly round shape. When the grindstone is freshly trued, the surface is particularly aggressive and can be used for an especially aggressive sharpening. The SG-200 fits the Tormek T-4 Original, Tormek T-4 Bushcraft, Tormek T-3 and earlier Tormek models with a grinding wheel 200 mm (7 7/8″) in diameter and 40 mm (1 5/8″) wide.