Up to five times faster than a standard adapter - Attaching the hole saw to the machine has always been a challenging task. This costs professionals time and money. With the Expert Power Change Plus, you can change hole saws in seconds thanks to Bosch's clever one-click adapter. This keyless system does not require screws or bolts for attachment. One hole saw is simply pulled out and another is pushed in. Despite this apparent simplicity, the Expert Power Change Plus still provides a secure connection: thanks to a reinforced shaft and a snug-fitting guide drill, it actually has less play than conventional systems. The Bosch Expert Power Change Plus hole saw system is designed to give hole saw users the best connection with maximum efficiency. This way, they save time and accomplish the toughest tasks at a high level. For use with Bosch's Power Change Plus quick-change adapter: for accuracy and robustness. Diameter: 7.15 mm, total length: 105 mm.