Proxxon Drill Sharpener BSG 220 The use of the BSG 220 is quite simple and even allows novices to sharpen drill bits to DIN. However, carefully study the instructions before using the BSG 220 if you wish to sharpen drill bits expertly. The operation is relatively simple, enabling everybody to sharpen standard 118° HSS, CrV and tungsten bits of 3 - 13mm diameter professionally. The sharpening operation is controlled exactly by means of the movable carriage. This moves from left to right and also rotates the drill bit on its own axis. This operation yields the correct relief angle. The carriage is fitted with a feed screw for fine feed. A dressing stone, ensuring a sharp cutting surface, is also fitted. Technical Data: Carborundum grinding disc size 50 x 13mm. 220 - 240V, 85W. ABS housing with fixing holes. Weight 1.7kg. An easy to understand operating manual and replacement disc accompany the unit. Proxxon No 21200