Surgical Instrument Manufacturers, Inc. Fenton, Missouri Exit Portfolio Surgical Instrument Manufacturers, Inc. manufactures hand-held micro instruments primarily used in ophthalmic surgical procedures. SIM makes over 200 unique surgical instruments, among the smallest and most precise used today. SIM is well positioned to benefit from the projected increases in surgical procedures due to the aging population and the trend toward smaller and less invasive procedures. CFB, in conjunction with Jay Bartling, provided $750,000 in a combination of subordinated debt and preferred stock.