The HCW-18 is a double-ended wrench for use on some one-piece type crank/bottom bracket systems. One end fits slotted adjusting cones with an outside diameter of 44mm or less. The opposite end fits three-notched fixed side cones with an outside diameter between 42mm and 46mm.

WARNING: California Proposition 65

This product contains chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm.

https://cambriabike.com/pages/warning-california-proposition-65