This is a A-4266001 Crimping Tool, Hammer-Style PN: 4266001Main Description As Following : A-4266001 Crimping Tool, Hammer-Style P.N: 4266001 Can be used w/ hammer or vise. Crimps terminals 8 ga. to 6/0 ga. Replaces: A-26A4266 MISCELLANEOUS , Crossed From: 4266-001 , , 5192-36892 JOHN DAY , 753-4266001 , Found in Section & Models : Ignition & Electrical Parts > Battery Cable Tools, (Miscellaneous) (UNDEFINED): SEVERAL Associated Items : New Also This is An Aftermarket Product And : Can be used w/ hammer or vise. Crimps terminals 8 ga. to 6/0 ga.