Specifications: Crankcase Splitter/Separator Tool For disassembling vertically split 2 and 4-stroke crankcases. Lets crankcase disassembly easier by safer pushing the crank assembly out of the case halves. Adjustable arms permit it to be used on a variety of bolt patterns. Comes with 8mm and 6mm mounting bolts. Crank Puller/Installer Tool For assembling vertically split crankcases. Safer and easier pulls crank assembly into crankcase. Heavy-duty steel construction. Comes with male and female M10x1.25mm and M12x1.25mm adaptors to attach to crank assembly. Package Included: 1 x Crankcase splitter separator and crank puller installer tools.