Edge Finder and Center Finders Set of 4 PCs Double End & Single End CNC Milling 4 PC Edge & Center Finder ; Time saving positing tool for jig borers, milling and other machines Shank Diameter: 3/8", 1/2" ; Hardened and ground on all working surfaces Locates edge quickly-shoulders, grooves, center points and scribed line .200 & .375 tip w/wiggler & Centering point Quantity: 1 (4 PCS) ; Weight: 7 ounce ; Case INCLUDED