Beefy Blocks - Level Your World. Use Beefy Blocks to level your RV's, tables, 5th wheel jacks or anything else. Crafted with an interlocking design. Heavy duty and strong, holds up to 50,000lbs of pressure, that's why we can offer a lifetime warranty. Beefy Blocks are made in the USA and have been designed with functionality, quality, and ease of use. Beefy Blocks you can rely on to remain steady. RV Wheel Chocks