Special Line SGP includes products engineered for specific tasks that offer the user key advantages over conventional products. This quality line also includes products that, due to their particularly high performance, offer ultimate economic efficiency. The patented flap disc POLIFAN-CURVE has been specially developed for work on fillet welds. It is the only flap disc in the world featuring a radial configuration of flaps allowing for grinding with all surfaces of the disc. High-performance flap disc for maximum stock removal on steel and stainless steel (INOX). 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.