The park tool 7582 will ream and face the head tubes of bikes that use the onepointfive interface standard the 7582 is designed for use with the park tool htr 1 or htr 1b headtube facer and reamer must also be used with the 750 centering cone adaptor to ensure correct alignment 19516 inch 404957mm41 diameter reamer2441 inch 4062mm41 facer bores a machined surface to a depth of approximately 25mm and then faces the end of the headtube shis terminology the 7582 i