The hitachi wf18dsl collated screwdriver has a silent clutch with a multiple disc clutch system that achieves shock free clutching and low noise operation the high rotation speed ensures rapid driving of screws and the detachable slider case allows for easy driver bit replacement and fast changing of collated screw strips the slider case is fitted with a belt guide to ensure accurate feeding of collated screw strips the quick adjustment button allows for you to switch between different sizes of