I want to add a screw to my tool box but am not sure how or if I am even approaching this correctly. What I want is to have different material screws. I would like a stainless screw and an aluminum screw. I cant get it to show up in my parts list correctly, it's like I need to add a new screw to my toolbox folder for each different material I would like. I am not having success with this, does anyone have any suggestions for me or have you run in to this issue? Thanks in advance everyone.