Fowler Magnetic Base with Fine Adjustment For use with holding indicators on Milling Machines, Lathes, etc... Supplied with fine adjustment clamp for indicators and electronic probes. Features include... 85 lbs Magnetic Pull Base Dimensions: 2" x 2 11/32" x 1 13/16" (50mm x 58.7mm x 46mm) V-Base for placing on round surfaces. On / Off switch 9.5" Height