The Ken-Tool 4-Piece H.D. Wheel Stud Remover Set feature internal tapered reverse threads that lock onto damaged studs or nuts, so technicians can remove them with an impact wrench. The 5/8" and 3/4" wheel stud removers are 3/4" hex drive. The left-hand and right-hand Budd Nut Removers are 1-1/8" hex drive. The set comes conveniently packaged in a compact storage case — and with a limited lifetime warranty.