Bought to match my blacksmith vise with I use copper legs and they work great. I like the magnets as they stay in place and I can attach them to the vise stand when not in use.
Pros
Scratch Resistant - 2 Piece Standard 6" Protective Soft Jaw Vise fits 4" to 6" vise and will prevent abrasion or damage to delicate surfaces such as wood and soft metals.