Providing professional and amateur musicians with a means of repairing guitars and pedals at a moment's notice, TT electronics' BI Technologies has developed a guitar and pedal repair kit using 12 different potentiometers. The GPK-101 repair kit has 24mm models P230 and P231 rotary potentiometers for tone and volume replacements. Audio taper resistance values are 150 and 500kOhm and 1MOhm. There is also 500kOhms reverse audio, while linear taper values are 250 and 300kOhms. The repair kit also includes standard solid and split-knurled shafts in 6 and 6.35mm diameter with 16 and 19mm lengths.