Wolf Tooth Bottom Bracket Tools are for the installation and removal of external cup bottom brackets. Pictured here are three of our eight sizes of Bottom Bracket Tools. These tools feature large finger notches for extra grip, a 3/8" square drive, a 1" hex drive, and magnetic compatibility with our Pack Wrench - Ultralight 1 Inch Hex and Bottom Bracket Wrench (shown behind the Bottom Bracket Tools). #wolftoothcomponents #multitool #bottombracket #workbench #machineshop #machinedinminnesota #wrench #biketools