Features 1、Features: 2、High accuracy, wear resistance and not easy to rust. 3、No need to rotate when measuring, quickly find the working edge. 4、When the probe touches the conductive workpiece, the light immediately illuminates and beeps. 5、These outstanding tools quickly locate the working edge and save time when finding positions in milling machines, jig borers, etc. 6、They use a highly sensitive position sensor and utilize a red indicator light that can be clearly seen and an audible buzzer. 7、The position of the end, outer diameter and inner diameter can be detected. Specification Specification: Item Type: Electronic Edge Finder Material: Stainless Steel Power By: 2 x AA Batteries (Not Included) Package List Package Include: 1 x Electronic Edge Finder