Custom Truck One Source, Inc. is a provider of specialty equipment, parts, tools, accessories and services to the electric utility transmission and distribution, telecommunications and rail markets in North America. The Company’s segments include Equipment Rental Solutions (ERS), Truck and Equipment Sales (TES)and Aftermarket Parts and Services. The ERS segment owns a range of new and used specialty equipment, including truck-mounted aerial lifts, cranes, service trucks, dump trucks, trailers, digger derricks and other machinery and equipment. The TES segment consists of the production and sale of new and used specialty equipment and vocational trucks, which includes equipment from original equipment manufacturers (OEMs) across its end-markets, as well as its Load King brand. The APS segment includes the sale of specialized aftermarket parts, including captive parts related to its Load King brand, used in the maintenance and repair of the equipment it sells and rents.