I purchased this about 3 years ago for leathercraft. I haven't had a chance to use it, so it's new and unused. The case has deteriorated and is folded and torn, but there is no problem with the quality. This is a replaceable-blade leather knife that can be used for a wide range of purposes, such as cutting, trimming, shaving, peeling, and scraping. Especially for cutting leather and resin sheets. Blade width is 43mm. In addition to cutting, it can also be used as a scraper to remove paint and adhesive, or for scraping. The blade is replaceable, so you can change the blade without using tools. If you feel the sharpness is diminished, simply replace it with a new blade, making maintenance easy. *The blade can be used on both the front and back sides.