The Jorgensen 6-Inch Heavy-Duty Steel Bar Clamp has a 6-inch opening with a 3-inch reach for your bigger projects. Two clamp pads protect your work from damage, and the fixed head is pressed and riveted to help keep material in place. Steel internal tooth washers measuring 1-3/16 inches in diameter give the swivel more stay-on power, while the castings use hardened steel thrust bearings and malleable ductile iron for extra strength. This clamp is backed by a 1-year limited warranty.