I'm analyzing the design file, but the command he used in all of the " - - - former " parts is unknown to me. And the command can't be edited... Do any of you know what command this is that he used? I tried researching it but couldn't find it. It's not a Form tool that he uses either, and it doesn't seem to be in the Solidworks Sheet Metal Command Library.

See https://grabcad.com/library/sink-19