Haybuster, now part of Duratech Industries International, has been around for more than 40 years. Haybuster is best known for manufacturing agricultural equipment. Their hay grinders evolved into industrial grinders. Today, Haybuster models are considered the agricultural line. Duratech handles the industrial grinders. Back in the day, there were some Haybuster Industrial grinders (IG) and Heavy Duty (HD) grinders built for the wood waste markets.