I know it's not advertised to fit, but these will fit newer Rickenbacker 4003 basses with the larger headstock, which was introduced in the early 2000s. My 4003 is a January 2010 build, and the XTender fits perfectly. The issue with the smaller headstock used on earlier 4003 and all 4001 basses is that it will interfere with the G string tuner. One could possibly modify a spare G tuner to allow installation of the XTender, I have not tried. I can assure everyone that on the newer headstock, it is a perfect fit, and works smoothly and beautifully, and of course is a handsome unit, actually not easy to spot from the front, all you can see is the arm, so if you're trying to be stealthy in an old school type band, only you will know! :) I highly recommend the XTenders, I have one on my Jazz bass as well. Top quality, and stellar service, you can't do any better than Hipshot.

I have a new EB MM Stingray 4... 2 band eq that is my favorite bass....but I miss the low B string on my 6 and 7 string basses.... Not anymore ... The double stop Xtender allows me to drop to a D and click again to a low B... I now have a 4 string bass that does what a 5 does without the extra "get in the way"factor! Hipshot rules the from the "bottom" to the top.

I play in a a band (El Sledge+) in which the guitarist employsthe NST (New Standard Tuning), a C pentatonic tuning where the guitar strings are tuned (from lowest to highest) as follows: C-G-D-A-E-G. So a bunch of songs are in the key of D or in related keys. The Hipshot bass extender thus gives me access to a low "D". Without this facility I'd have to sacrifice the robust richness of a low "D" and be forced to sound the "D" note in not-nearly-as-satisfactory/friendly positions that are not only higher but also must be sounded on the thinner gauged strings. The Hipshot Bass Extender is a simple yet amazingly clever innovation for bassists. I installed it myself in minutes using the simple and clear tutorial available at this site along with the writtien instructions included in the device's packaging. Orchids!

I just have to say you are without question the friendliest,service orientated,efficient and down to earth operation I ever had the pleasure of 'being involved' with as a customer.And Iask myself,and advise others,-----Why go anywhere else? As for my extender,superb!! Opens up a huge array of benefits to the musical palette,including wonderful low-end pedal notes reminiscent of a Bach Prelude! It can also give resolution to that riff you've always wanted to slot into some hard drivin' rock number. Use one-It's that simple.