Stainless Steel External Fixators. Very simple, very inexpensive ESF system widely used with success in France and Spain. The clamps split allowing placement of pins, (both positive threaded and negative threaded) mid frame. Not as strong as KE or KE Plus type so more clamps are needed. Bars are available in all sizes. There are now Meynard clamps available which fit standard KE bars. Very useful for mid frame and positive threaded pins. Clamps which work with KE bars carry a KE suffix. Uses a 7mm spanner.