The low-profile Thompson Anterior Lumbar Ring System provides effortless exposure to the lumbar spine. Developed with Dr. Jonathan Schoeff, the veratile ring frame allows for quick, precise placement of blades around the surgical site while providing the surgeon with an unobstructed view of the working area. New Free and Dual Angle Handles allow for macro and micro adjustments to blade's angle. With S-Lock Technology, add/remove blades, or switch from swivel to locked position with the simple push of a button.