The MST Knapp Lacrimal Retractor (Item #AL2180) is a purpose-built ophthalmic instrument in the Hooks & Retractors portfolio. Blunt 4mm x 8mm wide 4-prong tip. Flat serrated handle with polished finish. Overall length: 135mm. 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.