The OTC 4680 Wiper Puller is designed to remove wiper arms on passenger vehicles and light trucks. The unique design includes jaws that are forged with a radius to tightly hug the center screw for minimal spread while ensuring optimal contact with the object being pulled, the company says. The wiper puller includes two pairs of legs, including 9/16" and 1" wide, to aid in many types of small component applications. the leg shoulders of the wiper puller fit over the hex bar and can be secured into position with a simple turn of a wing nut, which are coated is plastisol for better grip. This tool includes a lifetime warranty.