The MST 1.0mm Trifacet Sapphire (Item #AK0010) is a purpose-built ophthalmic instrument in the Sapphire Knives portfolio. 1.0mm trifacet blade. Aluminum handle with J-locking mechanism. Straight holder. 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.