L. S. Starrett STR-190A Screw Jack Starrett Jack Screw No. 190A, Jack Only Jack Screws - Handy for leveling work on planer beds Reviews
Jack Screws - Handy for leveling work on planer beds, upright drills, machinery set up and general shop use. They are 1-1/4" diameter at base and have a range from 2-1/4" to 3-3/8" and can raise over 1,000 pounds. The set contains the jack, two extension bases (allows up to 6-3/8" height), auxiliary pointed screw, and two extension bases for irregular surfaces.
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