Superior-Lidgerwood-Mundy’s standardized commercial winches are tough, customizable and built to last. For 150 years, Superior-Lidgerwood-Mundy (SLM) has been at the forefront of innovation for the Marine Sector. Focusing on the strict Navy and USACE standards for much of that time has given the firm a unique perspective upon which to build long lasting and reliable products in the marketplace. In 2010, SLM decided to split its resources into Commercial and Defense divisions.