What model of truck is Mater based on in Pixar's Cars?

Mater is based on a 1951 International Harvester boom truck in Pixar's Cars.

The rusty tow truck is one of Radiator Springs' most distinctive residents. His design combines the look of a weathered International Harvester truck with a rear-mounted boom and towing equipment, matching his role as the town's capable but eccentric tow operator.

Mater's full name is Tow Mater, a pun on “tomater,” and his personality contrasts with his rough exterior. He is loyal, enthusiastic, and often serves as Lightning McQueen's guide to Radiator Springs. His friendship with Lightning becomes one of the franchise's central relationships.

The character is voiced by Larry the Cable Guy in the English-language films. Mater is sometimes loosely described as a generic tow truck, but the specific reference is a 1951 International Harvester boom truck. That detail distinguishes him from ordinary pickup trucks and explains his tall, utilitarian silhouette.