Tormek offers two models, the powerful T-7 with a 250 mm (10") grindstone and the compact T-3 with a 200 mm (8") grindstone. The T-7 has a strong 3 mm (1/8" steel) housing and the T-3 housing is shock proof ABS plastic. The T-7 is design for the toughest work and can run continuously without overheating. The T-3 is designed for 30 min operation per hour. With the T-3 you get access to the Tormek high quality sharpening system at a favourable price and it is ideal for sharpening woodworking hand tools, knives and scissors.