Bolt-on even more rifle-like accuracy with a Ravin Premium Crossbow Bolt Rest. Lightweight anodized aluminum construction delivers durability and enhanced consistency to every shot. The stainless-steel ball-bearing rest design minimizes contact points and reduces friction. Includes mounting screws for easy assembly. Anodized CNC Aluminum Design Use #10 Allen Wrench to Install Mounting Screws Included Not Compatible with R500 Models Weight: 0.4 oz.