 Tri-Sonics are wider than the more popular single-coiled pickups, such as used by Fender, so if Fender pickups are replaced with Tri-Sonics physical changes to the guitar may be required, such as routing the body or altering the mounting mechanism.There is also a mini Tri-Sonic, designed to fit directly into Fender style pick-guards.The construction of a Tri-Sonic pickup is unconventional.