The HART 1/2-inch Drive Impact Extension Bar Set is an amazing addition to any DIY mechanics toolbox. These extension bars are designed with extra durability in mind to stand up to the abuse from its intended use with impact tools. This set of Impact Rated Extension bars enhance accessibility making it that much easier for you to access those hard-to-reach fasteners when working within the tight spaces found in and around your vehicles engine bay. These extension bars are forged from high-impact rated Chrome Vanadium Steel for maximum strength and durability while allowing for minimum flex during use. This set comes with (1) 3-inch Impact Extension Bar, (1) 6-inch Impact Extension Bar and (1) 8-inch Impact Extension Bar. With HARTs Lifetime Limited Warranty, you can rest assured that you are getting an excellent addition to your toolbox.