TheK-Tool International 12-pc Metric 120-Tooth Reversible Combination Wrench Set is a set of high-quality, non-slip, open-end wrenches that can remove and tighten nuts and fasteners. Designed with a patented spherical box-end, the wrenches can work for different fastener types. Featuring a 3-degree swing movement, the wrenches work great in tight areas and allow for fast and easy ratcheting direction changes with the reversing lever. The 15-degree head offset provides knuckle clearance and has an innovative design that keeps the professional technician in mind.