Professional Musical Instruments Powerbender G Key For Adults, East Top Lucky 13 PowerBender is my personal favourite diatonic harp tuning, and it's becoming increasingly popular among players who like to jazz up their playing with easy draw bending technique throughout the whole range of the harp. It replaces all the middle octave overblows of Richter with simple draw bends. However,overblows are still available on every single hole to play fully chromatically if you wish. But even with just draw bends, PowerBender allows you to play easily in 11 keys. The Lucky 13 version of PowerBender duplicates the low octave to give you awesome low chording and octave possibilities, as well as allowing you to extend your bluesy runs lower down the harp The Lucky 13 PowerBender is available in all 12 keys. 4 octave range, draw bends in every hole = Heaven in a Blues Harp! WATCH THE VIDEO to get a good flavour of how this Lucky 13 sounds!