Just what the Fret Doctor orderd! In late 2002, many members of the Les Paul Forum discovered what woodwind players have known for years. Bore Doctor actually penetrates hardwoods, returning the fingerboard to its natural state and making it dimensionally stable. It can minimize the risk of future cracking or splitting. Because of the larger surface area of a fretboard, it was packaged in larger bottles, called Fret Doctor. Many thousands of bottles have been sold worldwide ever since, propelled entirely by recommendations from satisfied users. Highly recommended!!! In stock here at the store and our online shop.