Micarta is a composite of linen or paper fabric in a thermosetting plastic, originally used in electrical and decorative applications. Micarta was developed by George Westinghouse at least as early as 1910 using phenolic resins invented by Dr. Leo Baekeland. These resins were used to impregnate paper and cotton fabric which were cured under pressure and high temperature to produce laminates. In later years this manufacturing method included the use of fiberglass fabric, other resin types were also used. Today micartas are produced with a wide variety of resins and fibers and the term has evolved to generically refer to most resin impregnated fibre compounds. Common uses of modern micartas are as electrical insulators, printed circuit board substrates, and knife handles. Oh and nuts and saddles
I am not sure what fiber or resin specificly is used for nuts and saddles but it is pretty hard stuff yet easyy to machinethis is just one of many dealershttp://www.professionalplastics.com/MICARTA