The KASTAR 8585 Ratcheting Serpentine Belt Wrench is a versatile tool designed for working on serpentine belts in automotive applications. With a ratcheting mechanism, it allows for easy tightening or loosening of belts in tight spaces. The wrench comes with sizes 13mm, 14mm, 18mm, and 1/2″, catering to both SAE and Metric measurements. Made in the United States, this high-quality tool is essential for automotive professionals and DIY enthusiasts looking to efficiently work on serpentine belts.