The MST Rubenstein Preset LRI, 500 Micron (Item #AK6175P500) is a purpose-built ophthalmic instrument in the Diamond Knives portfolio. Designed around its specific working geometry, it features lancet blade with 500 micron depth preset. Please note that custom preset options are available. These long-handled Rubenstein Preset LRI lancet diamond knives measure 1.0mm in width and are available in various desired preset specifications. Winged footplate for superior control. Handle is straight aluminum and measures 4.75 inches long. 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.