Jim Root

In the music video for Unsainted and a performance on Jimmy Kimmel Live! Root was seen using EMG Retroactive pickups, with EMG's Instagram account suggesting that they are working on a signature set for him. This was later confirmed on the EMG Facebook page announcing that the set would debut at NAMM 2020.

In 2016, Fender released a sandblasted version of Root's Jazzmaster with red and black grain. This model is not available for purchase but can be seen used in several of Root's instructional videos on YouTube (as part of "The Sound and the Story").

On 17 May 2014, Stone Sour released an official statement saying that Root was no longer a member of the band. Moments before their statement, Root told a fan on Instagram of his departure, explaining "Not my decision. Not happy about it." In interviews, Root accused the band of being financially motivated and pursuing a more commercial musical direction, but also observed that he "wasn't really happy in that band anymore". Corey Taylor noted that the split initially put a strain on his and Root's relationship, which nonetheless was mended through channelling their frustrations into new Slipknot material.

The Fender Jim Root Jazzmaster was unveiled at the 2014 NAMM show. It has the same specs as the Jim Root Stratocaster. It only comes in flat black with an ebony fretboard.

In January 2010, a Jim Root Signature Fender Stratocaster was unveiled on the Fender website, similar to the one he has been seen using on stage, as of March 2009. In 2012, Orange announced a new signature Tiny Terror amp based on their Rockerverb 100, Root's main amp, called the #4. Then, the Squier Telecaster signature model was released, similar to the first Fender Telecaster Jim Root signature. The white model comes with a black pickguard and the black model comes with a white pickguard. Both Squiers have a maple neck and rosewood fretboard (22 frets). Jim's signature Squiers do not contain EMG 81 and EMG 60, instead containing Covered Passive Humbucking Pickups (Neck and Bridge).

In July 2007, Fender released the Jim Root Telecaster. Prior to his endorsement deal with Fender, Root had been seen using PRS, Jackson, Charvel, and Maverick electric guitars, and Guild and Martin acoustic guitars as well as a wide range of effect pedals and amplifiers. In a 2009 performance for Eurockeennes, and from 2010 to 2012, Jim used a Gibson Flying V.

Root was in a relationship with Lacuna Coil front woman Cristina Scabbia from August 2004 to May 2017.

He joined Slipknot in January 1999, replacing their original guitarist, Josh Brainard, who left the band during the recording of their self-titled album, reportedly after having fulfilled his recording duties. In fact, the only two songs Root recorded during the album's sessions were "Purity" and "Me Inside", the former being featured on the short-lived first pressing of Slipknot as well as the 10th Anniversary Edition, and the latter being its replacement. Despite this, the song has become a staple for most of the band's live performances. Slipknot vocalist Corey Taylor invited Root to join the band based on Taylor's past experiences working with him in Stone Sour.

Although filling in the spot of rhythm guitar in 1999, Root is considered to be one of the band's main songwriters and has written lead guitar parts for Slipknot's later albums particularly on All Hope is Gone and .5: The Gray Chapter. Of Slipknot's nine member lineup which lasted between 1999 to 2010, Root was the last to join the band. Root typically performed lead guitar in Stone Sour, although he sometimes played rhythm. He has spoken of both bands' guitar style as being twin guitar: "In both bands, I fulfill both roles. In Slipknot, Mick [Thomson] has some solos, and in Stone Sour, Josh [Rand] has some solos." During the recording of Stone Sour's Audio Secrecy, he and Rand recorded their parts simultaneously.

Root began performing with the thrash metal band Atomic Opera from Iowa in the early 1990s, not to be confused with the hard rock band Atomic Opera from Houston, Texas. Soon after they split up he went on to perform in bands such as DeadFront and Stone Sour; the latter which he joined in 1995, and returned to along with vocalist Corey Taylor, during its revival in 2002. Prior to joining Slipknot, he worked as a screenprinter, waiter, and busboy.

James Donald Root (born October 2, 1971), also known by his number #4, is an American musician, songwriter, and guitarist. He is one of two guitarists for the American heavy metal band Slipknot, and the former lead guitarist for the American alternative metal band Stone Sour.