F-ONE Oil Cleans & Conditions & Protects all Unfinished Fretboards. F-ONE Contains 100% Natural Oils & is Lemon-Oil Free. Petroleum & Wax Free. FRINE Fret Polish revolutionary, petroleum free formulation is designed to clean and polish all frets safely and quickly. 3 GRIP Fretboard Guards with an Innovative Handle keeps your hands from getting in the way and engineered curved angle contours to all fretboards. 1 each for all Small, Medium, Jumbo Fret Slot Sizes. Microfiber Suede Cloth specially designed to work with our FRINE Fret Polish. Machine Washable.