3/4'' Shank 4''L Precision Electronic Edge Finder CNC Milling Machine lathe Electronic edge finder Diameter of holding bar: 3/4'' Shank Length: 4'' ; Accuracy: 0.0005" ; Highly visible lights ; Batteries NOT INCLUDED Case INCLUDED ; Case dimension: 2-1/2''L x 5-1/2''W x 1-1/4''H Quantity: 1 ; Shipping Weight: 8 ounce