The GPS-12 adds stability and security to the disc brake lockring removal and installation process.The guide pin simply threads into the BBT-69.4 or BBT-169. A 5 mm hex fitting is integrated into the threaded end for secure and easy installation and removal.Once installed, the extra-long 12 mm pin engages into the hub, bolstering the fitment of the lockring tool and preventing misalignment.- Sized for 12 mm thru axle hubs - Usable length of pin: 61 mm (2.4")