The wide range Performance Line SG offers high-performance solutions for every application and material. Performance Line SG products achieve optimum results with excellent economic efficiency. The POLIFAN POWER flap disc stands out due to its aggressive stock removal rate and excellent service life while achieving maximum economic efficiency. It is the best conventional flap disc for steel. For demanding requirements, the high-performance POLIFAN-POWER flap disc is the first choice for the machining of steel. This versatile POLIFAN flap disc offers an optimal combination of outstanding service life and extremely high stock removal rates. 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.