6pc Set. To locate work edges shoulders, grooves, center points, and scribed lines for accurate machining such as jig boring, etc. All parts hardened and ground. Includes: .200" Single End Edge Finder, .500" Single End Edge Finder, .200" & .500" Double End Edge Finder, .200" & Pointed Contact x 1/2" Dia. Double End Edge & Center Finder, .200" & Pointed Contact Double End / Edge & Center Finder, .200" Single End / Edge Finder.