Bone Nuts & Saddles for Banjo, Mandolin, Steel String, Electric and Classical Guitars. (Category Includes Both Bleached & Unbleached Materials.) Please note that these are Nut and Saddle Blanks and that the sizes stated are often minimum sizes. Because of the tendency of freshly prepared bone to warp - especially so with longer saddle blanks - I prefer to produce extra thickness blanks that will allow some sanding without compromising the stated measurements.