help with old bolting and new bolting

If you are design user then you can't change the bolting method. Contact your Catalogue and Spec person.

I am the Cats&Specs person.  This is new to me and I haven't encountered it before.
Kindly explain the process Shrivallabha.

Thanks

If you are design user then you can't change the bolting method. Contact your Catalogue and Spec person.

I am the Cats&Specs person.  This is new to me and I haven't encountered it before.
Kindly explain the process Shrivallabha.

Thanks