undefined Bi-Color Ceramic Cut Medium Kerrison Rongeurs feature a combination black and gold titanium nitride surface treatment, which hardens and protects the instrument body and cutting surface for a durable, smooth gliding action. These coated rongeurs do not need sharpening as often as traditional rongeurs, thus reducing operating costs and enhancing service life. Medium Kerrison Rongeurs are an ideal choice for surgeons preferring to combine the benefits of the small handles on Micro Kerrison models with the larger bite opening of the Spurling-Kerrison models.