X tools pro crown race setting tool specifically sized inserts making set the headset crown race on the fork more efficiently includes one setting tube three 1 inserts and three 118 inserts for installing the crown race used on most 1 and 118 headsets instructions select the appropriate insert and place it on the crown race use a hammer and tap the end cap on the tube to seat the race into its proper place buy x tools crown race setting tool from chain reaction cycles the worlds