Tekton Flare Nut Crowfoot Wrench sizes scale optimally with fitting depths to achieve the best possible combination of engagement, access, and strength. Our design is leaner than conventional 6-point crowfoot wrenches, giving you more room to work in tight spaces. The wrenches are abrasive blasted to create a smooth, satin finish. Our electroless nickel plating process applies a uniform, corrosion resistant coating to the entire tool surface. Each crowfoot wrench has a permanent high-contrast size marking engraved on the side. The wrenches are made entirely in the USA with USA-sourced materials. Use to disconnect brake, fuel, and hydraulic lines or oxygen (O2) sensors without rounding-off fasteners. Most of the steps, including machining, broaching, blasting, plating and engraving, take place at Tekton's manufacturing facility in Grand Rapids, Michigan.