The MST Thornton Fixation Ring, Open (Item #AR0430) is a purpose-built ophthalmic instrument in the Fixation Rings & Picks portfolio. Designed around its specific working geometry, it features open ring. 13mm diameter with 7mm opening. Flat handle. Fixed style. Overall length: 133mm. This combination of thoughtful design details and clearly defined specifications helps surgeons quickly identify the configuration that best fits their preferred technique and procedural needs.