Photoelectric edge finder, non-magnetic centering rod Battery: 1.5v special battery for photoelectric edge finder * 2 (delivery without battery) (The edge finder is mainly used to determine the X, Y zero offset value of the workpiece coordinate system in the machine tool coordinate system, and it can also measure the simple dimensions of some workpieces.) Commonly used in milling machines, end machines, and other mechanical equipment. Colour: silver Material: stainless steel Size: length: about 160mm Package Contents: 1 * Electronic Edge Finder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.