Drive nails for a living… got carpal tunnel syndrome?  Check out the Craftsman Nextec Hammerhead Auto Hammer.  The Hammerhead uses a 12-volt lithium-ion battery to drives about 2000 impacts/minute and up to a 2.5-inch nail.  The hammer also has a retractable sleeve and a magnetic head so you can nail with only one hand.  Only $99.99.  I like it.  Video of the hammer in action after the break.