OTC 5961 Drain Plug Pro Tool Kit Interchangeable design Includes attachments for standard drain plugs, low profile drain plugs, internal hex drain plugs (17mm) and 1/4 inch hex bits Use with any 1/4 inch square drive socket in your tool box The flexible shank with 1/4 inch square drive helps remove or thread smaller fasteners even in hard to reach places Contained on a handy socket rail for hanging or tool drawer storage