Creating thick borders around rows

Hey guys, I have hundreds of excel workbooks with multiple sheets, I am trying to apply specific formatting for printing purposes. I am having trouble with the bordering. I used the record macro and came up with the following macro.

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I need this to be something that I can just run and it will apply to all the numbered "Items" in a worksheet that looks like the one that I have attached. The section rows; 1,2,3 in the attachment have the same number of rows however that is not always the case.

Thanks for any help, I am kind of a newb when it comes to Microsoft Macros.

That worked like a charm, JBeaucaire you have the best Macros around!!