Park Tool Bottom Bracket Tool Guide Pin Set. Features: A 5 pin set that adds stability and security to bottom bracket removal and installation using extra long pins to engage into the bottom bracket or hub, preventing misalignment Each pin included in the GPS-1 is sized for one of the most common thru axle hub or bottom bracket spindle standards 5mm hex fitting is integrated into the threaded end for installation and removal Specs: Model: Bottom Bracket Tool Guide Pin Set, GPS-1 Description: Bottom Bracket Tool Guide Pin Set Color: Black Remarks: Compatible with Park Tool BBT-27.3, BBT-35-12, BBT-35-36, BBT-47-12, BBT-47-16, BBT-49.3, BBT-59.3, BBT-69.4, BBT-79.3, BBT-135-12, BBT-147-12, BBT-169, BBT-179