Originally Posted by
fietsbob
The ones like Trek sold, and the Campag ones , have a hex head on the end. you put a socket in the 3/8 drive ratchet handle then, the leverage is what makes it easy.
My Shimano puller has flats that take a 16 mm or 5/8" open end wrench and a 14 mm recess in the screw press' head. I use the wrench flats but if you happen to have a 14 mm allen key, that would work too.