You won't need one.
#1. Remove wheels
#2. Remove large axle nut from axle
#3. Remove caliper and rotor
#4. Hit the studs with a large hammer to pop them out the back side
#5. 4 bolts behind the hub that hold it to the upright, loosen those at least 50% (this will give you room to insert the longer studs.
#6. insert new longer studs through the back. Seat gently.
#7, Use a greased washer pack and an old open ended lug nut on the stud. Tighten this down gradually to pull the new stud into the hub.
#8. install wheel, torque to 85 ft/lbs. Drive a mile, torque again to 90ft/lbs. Remove lugs. Torque to 85 ft/lbs.
Have you done this? Is this the right procedure?