TORMEK SG-250 ORIGINAL GRINDSTONE  has evolved over the years to offer the best combination of efficient steel removal, smooth surface finish and a long life. This stone efficiently cuts all types of tools and steel qualities including HSS. 250mm diameter wheel, 220 grit. The wheel comes as standard with the Tormek T-8 Original. Fits Tormek T-8, Tormek T-7 and previous Tormek models with a 250 mm stone diameter.