Expert Power Change Plus for maximum speed when changing hole saws and drillsHole saws are a great accessory, but attaching them to the drill correctly has always been tricky. It is time-consuming and costly for the craftsman. With EXPERT Power Change Plus, you can change the hole saw in seconds thanks to Bosch's smart click adapter.Advantages For use with Bosch Power Change Plus keyless spindle: offers precision and robustness. Enjoy maximum efficiency with a Bosch Quick Change system. Designed for quick and easy core removal. Works with a full range of hole saws. Click system - no need for extra tools. Reinforced shaft transition which makes the shaft last longer.