Custom Truck One Source, Inc. provides specialty equipment rental services to the electric utility transmission and distribution, telecommunications, rail, other infrastructure-related industries in North America. It operates through Equipment Rental Solutions, Truck and Equipment Sales, and Aftermarket Parts and Services segments. The Equipment Rental Solutions owns new and used specialty equipment, including truck-mounted aerial lifts, cranes, service trucks, dump trucks, trailers, digger derricks, and other machinery and equipment.