Tonka
From Transformers Wiki

Tough enough to support Santon.
Tonka is an American toy company best known for its metal toy trucks and construction vehicles. During the 1980s they also marketed GoBots, the biggest competitor to Transformers during Generation 1. Tonka was eventually bought out by Hasbro in 1991, and some GoBot-related trademarks (including the name "Go-Bots") have since been reused within the Transformers franchise. Hasbro's Tonka division would eventually design and release the 1-2-3 Transformers.