- Gold speed Evo R20-L (20:1) Surgical use, Implantology, Osteotomy Specifically for surgical use, gear ratio 20:1, can be heat-disinfected and sterilized in an autoclave, can be disassembled for thorough cleaning, single spray, with hex-type tightening system, for burs and surgical instruments with contra-angle stem Ø 2.35 mm, internal Kirschner/Meyer cooling system and external spray, LED with incorporated generator. **For further product information, please contact Chat Support**