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. Users who rely on top performance choose the POLIFAN-STRONG flap disc. It surpasses conventional flap discs and redefines the highest levels of efficiency. With its patented and unique design, it achieves an unsurpassed stock removal rate. It also has an astonishingly long service life over conventional flap discs. The innovative POLIFAN-STRONG flap disc is unique and has a particularly high performance level. Due to its patented design, it offers significantly higher economic efficiency compared to conventional flap discs. 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.