These guys have more types of screws made more different materials and in sizes I've never seen before.
http://www.mcfeelys.com
example; 1/4 X 14 inch. http://www.mcfeelys.com/product/TMR-4014/x-14-Extra-Long-Wafer-Head-Screws-Spider-Drive
...lots of other screws, tools and goodies too.
Another good tool supply place , for hand tools is ,
http://www.traditionalwoodworker.com/product_info.php?products_id=1934
This might be the orginal cordless drill ,
(http://www.traditionalwoodworker.com/images/500-0114-lg.jpg%20 )
Question is did Herdy come before Gerty :-/
Oh I forgot about those!! I had an old one of Dad's, but it broke long time ago. We drilled lots of holes with it! I think it came after the brace, but it was called a drill IIRC, so maybe it is the original cordless model. Drill by ArmStrong; sort of like the original automobile power steering, an 18 inch wheel and Strong Arms. ;D