With the assurance you are Ready for the Road Ahead , the Stemco 2.625" Zip-Torq Axle Spindle Nut is the ideal solution for quick and effortless removal and installation of axle nuts. Its single piece design permits quick installation without special tooling. This axle spindle nut's integrated locking mechanism prevents back off. The Zip-Torq offers maximum grip and torque, boasting compatibility with most automated installation equipment. FleetPride is your First Click in Heavy Duty .