No. 1A fits 1/2 inch to 8 inch pipe made of aluminum
The combination of support bars and chain allows these versatile clamps to hold a wide range of pipe sizes. Unlike other pipe clamps that only allow tack welding, the open design of these clamps permits welding around almost the entire circumference. Clamps resist strain, heat, and abuse while keeping perfect alignment. Not rated for holding capacity.Machined swivel nuts, pins, and special chain screws for trouble free assembling of the vise onto the pipe.