Designed to boost guitar performance, TUSQ XL is precision engineered and specially formulated to bring out the hidden harmonics and richness in every note. TUSQ XL is based on the highly resonant TUSQ man made ivory and impregnated with PTFE, the slipperiest substance on earth, to improve the tuning performance of the guitar. The PQL-1000-00 is a great option to upgrade or replace the nut on your Fender style electric guitar or bass.  It is pre-shapped but requires slots to be complete.