The K-Tool International 2-pc Spring Crowfoot Wrench Set features a ratcheting action design that allows the tool to rotate back and reposition, allowing for better performance especially in tight spaces. Featuring serrated gripping teeth with spring-loaded self-adjusting jaws, it’s ideal for easy adjustment of tie rods and other difficult-to-access parts. The wrench firmly grips all types of fasteners from 8 to 17mm for 3/8" drive, 14 to 32mm for the 1/2" drive.