This anchoring system securely holds your motocross bike in your trailer without the use of tie-down straps, floor anchors or wheel chocks. It takes an enormous amount of pressure off the fork seals during transit, and frees up valuable space in your trailer, making more room for other motorcycles, bikes and gear. Remove it quickly from the trailer floor by unscrewing the four thumb screws, leaving only the low-profile mounting plates. Each plate has a D-ring for additional anchor points on your trailer floor. Dimensions: 20"H x 10"W x 9"D. Weight: 20 lbs.