Hey RV owners and trailer folks - these OULEME wheel chocks are seriously solid! Made from tough, durable rubber that's completely weatherproof and UV-resistant, so they won't crack or degrade in sun, rain, or snow. Each chock measures 8.5x4x6 inches and weighs about 4 pounds, giving them enough heft to stay put without being too heavy to carry. The triangular design with double-sided anti-slip texture creates awesome grip and friction against your tires. The built-in carry handles are genius - makes them so much easier to move around than those cheap plastic chocks. Perfect for RVs, campers, travel trailers, trucks, boat trailers, ATVs - basically any vehicle that needs secure parking. The quality is noticeably better than what you'd find at big box stores - they feel substantial and well-made. Having four in the pack means you can chock both sides of two wheels for maximum safety. Seriously, if you're tired of those flimsy chocks that slide around or break easily, these rubber ones are totally worth the investment. They provide that peace of mind knowing your vehicle isn't going anywhere when parked on inclines. OULEME specializes in automotive tools, so you know they're not cutting corners on quality!