Simple and economical the park tool hhp 3 home mechanic bearing cup press is designed to install all sizes of head cups 1 to 1 12 and one piece bottom bracket cups will also press bb30 and bb90 bb86 or bb92 system cups the thread of the hhp 3 is 58 16mm diameter nominally 16mm and will work to press the bmx bottom brackets hhp 3 has a maximum working length of 385mm park tool hhp 3 home mechanic bearing cup press features its simple and economical the hhp 3 is