Quick Chucks fit into a standard 3/8 inch key or keyless chuck. Quick change hex shank attachments or any direct drive 1/4 inch hex bits can then 'snap' in effortlessly. Six flats on the shank ensure precise location in the chuck and spring-loaded outer sleeve makes attachment removal easy.
When using the SDS+ chuck, the hammer action must be switched off.
Yankee quick chuck is for 5/16 inch No. 131A large spiral ratchet screwdrivers, and replaces the standard bit, enabling Snappy tools to be used.