Easily mount lead ballast to roll cage tubing, 1/2"-13 thread mount points on each side of the clamp, Anodized black for a durable and attractive finish, Clamp on design eliminates the need for welding, Available for 1 1/4", 1 1/2", 1 3/4" and 2" round tubing or 1-1/2" and 2" square tubing.