For universal coarse to fine grinding applications in industry and professional trades. These are ideal for large stainless steel (INOX) surfaces. The Bosch X-LOCK system for angle grinders enables you to change products quickly and easily. Instead of a round center hole, the X-LOCK system features an X-shaped contour, which allows the product to be fixed on the angle grinder in a form-fitting manner. This means different kinds of products can be clamped in a reliable manner in a very short space of time. The unique system meets the highest of quality and safety standards and can withstand rough and harsh application conditions.;X-LOCK from Bosch is the world's first quick-changing system for angle grinders: Position the tool in the X-LOCK holder, click it into place – and you're ready! It's never been so easy to change accessories on angle grinders. X-LOCK is creating a new standard which makes professionals’ lives easier and increases their productivity. Bosch Power Tools relies on strong partners like PFERD. PFERD has developed the principle for connecting the X-LOCK punched part with the bonded abrasive, flap discs and brushes and created the conditions to enable them to be produced industrially. POLIVLIES® grit size 240 F = fine (blue)