This is a really good product and worked perfectly for me to drill out 3 broken studs and holes on my exhaust manifold to exhaust flange . Flange stud thread were 3/8in and the helicoil set worked as advertised and saved me huge amount of time and money. The drilled bit that came with the set were really very effective and had no difficulty cutting through the flange holes to make them wider. Exceptional product , very generous with the tools and helicoils, so a great kit to have around the workshop.
This is a really good product and worked perfectly for me to drill out 3 broken studs and holes on my exhaust manifold to exhaust flange . Flange stud thread were 3/8in and the helicoil set worked as advertised and saved me huge amount of time and money. The drilled bit that came with the set were really very effective and had no difficulty cutting through the flange holes to make them wider. Exceptional product , very generous with the tools and helicoils, so a great kit to have around the workshop.