For compressing valve springs with the cylinder head removed from engine. Product Features:Powerful lever action tool has handle on the outside. Throat depth is 9-3/4. Jaws open from 3-1/4 to 8-1/2 to fit large displacement engines. Interchangeable offset and straight jaws are included. Chrome and black oxide. Storage case includes laminated Instruction Sheets with Photos showing the tool in use.All Instructions developed by a professional repair manual writter.
