4214M Stud Puller Set 5pc 1/2"Dr 6-14mm | 5 Piece Stud Puller Socket Set 6-14mm 

Made In Japan, Highest Quality, Most Dependable
For tightening or removing threaded rod/studs without damaging the thread.
Hexagonal body design reduces stress on stud puller and rollers- prolonging perfomance life.
Replacement roller kits available