The black and decker kr604cresk is a 600 watt percussion hammer drill suitable for most diy drilling tasks it has a hammer action suitable for drilling into masonry spindle lock for easy bit change and maximum accessory grip and a 13mm high quality keyless chuck the variable speed offers more control and is essential for screwdriving with the secondary handle to provide additional control supplied with a side handle and a kit box specification chuck 13mm keyless input power 600 watt no load spee