Edge and center finders and accessories ensure that a spindle is properly positioned at the edge of the workpiece or centered over a pilot hole or bore. Edge finders, center finders, and wiggler sets position the spindle on a mill or CNC machine and ensure correct positioning for a desired cut. 3D edge and center finders have a dial indicator or digital display with a probe and stylus are used for higher precision alignment and setup. Replacement tips for indicating edge and center finders locate edges, shoulders, center points, and lines in a workpiece.