I get sent all kinds of gear for free but never accept it. I prefer to buy the equipment I use. I bought my Tonebone Classic.

Gary Moore's quote about Radial Tonebone Classic.

As soon as I plugged the Tonebone Classic in, I could not believe how quiet it was. I was very impressed. It is both responsive and musical. I can honestly say that I truly appreciate the Tonebone and feel that it is a valid addition to the very fabric of the distortion guitar sound. This is a rare find. - found on Radial's website, Johnson's quote about Radial Tonebone Classic

According to this picture Blake Mills sports two Radial Tonebones on his pedalboard. Blake Mills also tweeted: "Radial tone bone great for polarity and ground flip"

On Radial's website, Rzeznik was mentioned as user of Radial Tonebone Classic pedal.

I a-a-a-absolutely love the Tonebone pedals. I have tried them out extensively and will be incorporating them into my stage setup. They are truly toneful, expressive and totally rock.

My Tonebone Classic distortion sounds very good! It has a solid bottom end and wide range of colors.

Juanes about Radial Tonebone Classic.

The switcher controls a Fuchs Royal Plush compressor, a Morley Steve Vai Bad Horsie Wah, a Radial Engineering Tonebone Classic, a Marion Henry Electric Fuzz Bucket, a Moogerfooger MF-104M analog delay, a BBE MB-2 Mind Bender vibrato/chorus, Boss PS-5 Super Shifter and PH-3 Phase Shifter pedals, a Source Audio Soundblox 2 Orbital Modulator, a Malekko Omicron Fuzz, a Guyatone MD2 Micro Digital Delay, and a Banzai Cold Fusion Overdrive that he compares to a Klon Centaur and says is key to his sound.

Mentioned in this August 4, 2013 Seymour Duncan blog interview. It is also mentioned in this June 15, 2014 Premier Guitar interview.

Seymour Duncan

Tell me about your current tour set up?

I run three different signals, all direct. Signal #1 is a direct line off of my Shure wireless. Line #2 is the mighty Avalon U5. Line #3 runs through the pedalboard, which currently features a Radial distortion and an old purple Ibanez chorus (for the song “Holy Ground”) and into an active Radial DI. I have an Xotic Effects RC Bass Boost that stays on all night. I’m proud to be endorsed by Fender bass guitars. The current arsenal is a ’62 Reissue Precision, an American Standard Precision with the Seymour Duncan SMB-5A humbucker pickup added in the bridge position, a Gretsch Broadkaster, A Fender Cabronita (a new, precision-style single pickup bass) and a ’71 Orlando. I use Fender nickel bass strings.

Premier Guitar

Amos remains a bass gear junkie, constantly searching for new tones and sonic toys. He takes a straight-ahead approach to his tone, relying on great basses as opposed to lots of outboard gear. A proud Fender endorsee, Amos used his ’62 RI Precision (loaded with Seymour Duncan Quarter Pounders) on almost everything during the last U.S. tour, though he also carried a Cabronita P-bass and a Dimension 5 for extended range. His one “quirky” bass, a ’71 Orlando, also sees some use. His pedalboard is modest: an Xotic Bass RC Booster, a Radial Classic Tube Distortion, and an ancient Ibanez chorus, all controlled by tech Steve Uncapher. With no amps on stage, Amos runs it all through an Avalon U5 preamp.

As for the dirt in my signal, I’ve been using a Crowther Audio Hotcake, which I love because it’s versatile and mixes great with any amp that I put it through. Some others on my board are a Radial Tonebone Classic distortion, Electro-Harmonix Holy Grail for reverb and an ISP Decimator.

According to Radial's website, Eaton uses the Radial Tonebone Classic pedal.