Subrosa magnum bash guard sprocketthe new magnum guard sprocket from subrosa offers full coverage and is designed to prevent damage to chains and teeth whilst grinding subrosa have cnc machined the magnum sprocket for the finest 7075 alloy so its light but remains super strong it has 18 offset teeth for better chain alignment and can be rotated 5 times to even wear and tear features extra thick full guard bash sprocket teeth offset 18 for better chain alignment construction 7075 alloy