1,000 lbs. load bearing capacity per dolly Spring-loaded lock pins for easy length adjustment 3 in. non-marring swivel casters to prevent floor damage Sturdy and highly functional, ROBERTS Heavy-Duty Cargo Dollies are made of industrial-strength steel. Expertly manufactured, they are welded and bolted together to offer greater weight capacity and hold up to 1,000 lbs. each. The spring-loaded lock pins allow to easily extend and adjust the length from 24 in. to 33 in. The non-marring 3 in. casters ensure easy movement without damaging your floors. These dollies are ideal to move furniture, appliances, rolls of carpet, sheeting, equipment, and are durable to boot. Click here to shop more ROBERTS flooring underlayment Spring-loaded lock pins allow easy exte.