Starrett S191 1.5"-2.25" "Little Giant" Jack Screws (50687)

No. 191 have 20-pitch screws and for those who desire a finer adjustment

"Little giant" jack screws are very handy for leveling work on planer beds, upright drills, setting up machinery, and for general use in the toolroom or machine shop. An auxiliary pointed screw is supplied, to be used in place of the screw with swivel cap Extension base is furnished for places where it is not possible to obtain a bearing on a flat surface Extension V base is for use against a cylindrical form.
Brand: Starrett, Model: S191