The best tool for setting a crown race.
"I used this to set a crown race with my Wolftooth GeoShift headset (along with Wolftooth's crown race adaptor for the CRS). Worked great. I previous tried to get a bike shop to set the old Wolftooth headset who didn't have the proper tools and mangled the crown race and then that destroyed the bottom headset bearing. The CRS-15.2 set the new crown race perfectly straight."

