Product description ball speed for everyone spin if you need it a fairway wood that closes the distance gap on your driver the jpx900 uses mizunos expanding shockwave sole to produce prodigious ball speeds with a centrally located single sliding weight to make it playable for a surprising breadth of swing types fast off the face our shockwave sole enables the club head to contract and expand on impact creating more energy than normal for a compact head the shockwave also puts mass low in