The Park Tool RT-1 Headset Cup Remover is used in conjunction with your favorite hammer to make lots of noise as you pound out headset cups. Another essential tool if you plan on doing headset installations at home. The RT-2 fits 1-1/4 and 1-1/2 inch headsets, the RT-1 fits 1, 1-1/8, and 1-1/4 inch headsets and it also works to remove press fit 30 (PF30) Bottom Brackets.