You'll be amazed at how easy it is to pop out minor dents in panels. Handy set of three Suction Cups for dent pulling. All rubber composition with release tabs. Sizes for every job: 2-1/4in. with single-finger grip, 3-1/4in. two-finger grip & 3-1/4in. Grifter hand grip. Great assist for dinging dents. Also aids in holding window glass in position while working on regulators. Will grip any smooth non-porous surface firmly.