Craftsman 12 in. Bar Clamp —
I bought 4 of these to install some kitchen cabinets and they worked great. No marring. I used a coupon and a gift card to get these clamps so that was a good deal. They held the cabinets well. I was afraid they would slip when I first bought them because the pads looked smooth but they didn't slip or mar the cabinets.
I used to buy stuff like clamps at Harbor Freight (who can mess up clamps) but I'm buying more Craftsman stuff now.