About Park Tool Headset & Bottom Bracket Cup Remover 1 1/4 - 1 1/2 (RT-2)The RT-2 makes headset bearing cup removal easy. The tool is pulled through the frame until the flared ends snap in behind the cup. The tool end is struck with a mallet and the flared ends evenly distribute force around the cup as the cup is driven out. Strong heat-treated alloy steel construction with nickel finish for a long service life. FeaturesRemoves bearing cups from head tubes using 1¼" and 1½" headset standards SHIS terminology: Removes ZS44, ZS49, ZS55, ZS56, EC49 and EC56 headset cups Also removes bottom bracket cups on one-piece crank systems For use on bearing cups with an ID of 38 to 55 mm (1.5" to 2.1") Nominal OD of shaft is 25.4 mm (1") About Park ToolPark Tool are the world's largest bicycle tool manufacturer. Located in St. Paul Minnesota they have been designing and manufacturing bicycle specific tools since 1963. Their dedication to quality and innovation have gained them the reputation for producing the best bicycle tools in the world.