Edge finder – optical Design: Probe precision 0.01 mm, hardened and precision ground, with luminous red LED display. Application: For measurements on drilling and milling machines, machining centres, for external and internal centring. The indicator lights up on touching the workpiece edge. The zero line is reached allowing for stylus sphere radius. The resiliently mounted ball folds away on passing the workpiece edge so as to avoid damage to the stylus. Scope of delivery: Edge finder including battery A23.