STARRETT 191D Little Giant Jack Screw - Auxiliary Pointed Screw Only (191D)

Little Giant Jack Auxiliary Pointed Screw. Little Giant Jack Screws are used for leveling work on planer beds, drills, setting up machinery, and general use in toolrooms or machine shops. 191 Series are 1-1/2" to 2-1/4" / 38-57mm in Size. Series 190 and 191 have 20-pitch screws and for those who desire a finer adjustment, the F190 has a 40-pitch screw. Auxiliary Pointed Screw Only.