RING LOCK. Used for different purposes, such as cutting of the gums, sutures or bandages. With smooth or toothed/serrated blades and pointed or beveled tips for specific different surgical purposes.. Ring Lock System? consists in 2 bearings (one in stainless steel and one in aluminum) and a Teflon?s ring: all 3 parts are assembled together under pressure. Thanks to this system, the blades are moving on a circumference that is 60% larger than a traditional scissor. This is the key for a smoother and more precise cut, allowing a longer duration of the cutting edge. The internal Teflon ring is auto lubricant and a not deformable material (used in the autoclave)..