when you change a headset for a friend or yourself every once in a while ( 10 years or so ) these home made tools will do .
but when you work as a mechanic as i do . with so many different types of headsets / bottom brackets / cups / models /and sizes there is nothing like the http://www.parktool.com/products/documents/HHP-2_Instruction_6-2-09_200963_45865.pdf
when you change a headset for a friend or yourself every once in a while ( 10 years or so ) these home made tools will do .
but when you work as a mechanic as i do . with so many different types of headsets / bottom brackets / cups / models /and sizes there is nothing like the
http://www.parktool.com/products/documents/HHP-2_Instruction_6-2-09_200963_45865.pdf
NICE
Cheers
/S