The edge finder is used to determine the X and Y zero offset values of the workpiece coordinate system within the machine tool coordinate system and can also measure basic dimensions of certain workpieces. Commonly used in milling machines, end mills, and other mechanical equipment. Net weight: about 168 grams Battery: 2 x 1.5V special battery for photoelectric edge finder (battery included) Note: The appearance of the product may vary slightly due to different production batches; this does not affect functionality. Please refer to the physical item received. Color: As shown Material: Stainless steel Package Contents: 1 x Photoelectric edge finder 2 x Battery Only the above items are included; other items are not part of this package. Note: Lighting reflections and differences in display screens may cause the color of the item in the image to vary slightly from the actual product. Measurement error allowance is +/- 1-3 cm.