This Gem G1300 steel butterfly clamp has an overall width of 3 3/8 inches. It's a perfect engine mount butterfly clamp designed for narrow - style American rail karts, offering reliable performance and stability.

To use this clamp, first, make sure your narrow - style American rail kart is in a stable position. Then, place the clamp at the engine mount area of the kart and secure it tightly. When installing, ensure that the clamp is properly aligned to avoid any issues. As for maintenance, regularly check the clamp for any signs of wear or damage. If you notice any rust, clean it off and apply a light coat of anti - rust paint. Also, make sure the tightening bolts are always secure, but don't over - tighten them as it might damage the clamp or the kart's engine mount. Keep it in a dry place when not in use to prevent corrosion.