DSI Surgical Implant Kit Drill Refill Most-used Stepped DrillsThe DSI Stepped Drills Refill Kit the heat generation that is released during the drilling process with a dull worn off drill is immense. It will bring the bone marrow to expand. It has been well documented that using worn and dull drills for preparing an osteotomy and inserting an implant into an overheated and overexpanded bone is very dangerous. The bone will compress back and essentially will push the implant out causing extensive amounts of pain