I got tired of using rags to hold parts in my vise without damaging them. Even aluminum will leave marks on blued surfaces, etc. So, I drew these soft jaws up. Work great. OpenSCAD source code included, so you can customize it to your vise. This was drawn up for a Harbor Freight Dyole 4-1/2" SKU 57737. Other Doyle vices probably only need the length changed. Other brands, well, change it up as you need. I printed it solid.