Max Wocher. Trephine Set in Rosewood Box. Scalpels, Trephines, Chisel, a Lenticular and a Double-Ended Elevator Forceps, and a Trephine Brush. Made in Cincinatti, Ohio. Circa 1840's. Trephine Sets were Used for Cutting Out Circular Holes in Bone, usually the Skull, to Relieve Pressure on the Brain or for Surgery.