A great new slide design developed by Phil Hoolahan and marketed by Jim
Dunlop. This thing makes combining playing the slide and fingering
easier than ever. While I can't play it a lick, watch Phil in action

http://www.youtube.com/watch?v=J3FQ0EPQURY

http://www.jimdunlop.com/index.php?page=products/pip&id=95&pmh=products/slidesG