STARRETT 190B Little Giant Jack Screw - 2" Extension Base Only (190B)

Little Giant Jack Screw Base Extension, 2" (50mm) Base. Little Giant Jack Screws are used for leveling work on planer beds, drills, setting up machinery, and general use in toolrooms or machine shops. 190 Series are 2-1/4" to 3-3/8" / 57-85mm 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. 2" Extension Base Only.