Stewart-MacDonald is your source for quality bone! Bone is traditionally favored for quality instruments. Our unbleached bone is even harder than bleached white bone, and has a mottled cream vintage look. Its hardness and density contributes to good tone, it polishes well, and it allows more precise filing. Shaped nuts will save you a LOT of work—a head start for the novice builder, and a bonus for the busy repair shop where time is money! The dimensions have been carefully researched, and minor trimming, slotting, and sanding are all that's needed to fit most popular guitars.