I purchased these to replace the clamps on my battery charger. The original battery charger clamps only opened about 1.25" which is not enough for some car/truck battery terminals. These new clamps have 10 times stronger grip and open to about 1.5". These new clamps have strong springs. It almost takes 2 hands to open them! I would buy them again. They are about 6" long and 3/4" wide.