Descriptions: The role of the edge finder is to determine the position of the workpiece on the machine tool ie to determine the working coordinate system. The edge finder is a high-accuracy measuring tool that quickly and easily sets the precise center position of the mechanical spindle and workpiece reference. Use with speed 400-600rpm. Suitable for traditional milling machines and integrated processing machines. Mechanical rotation measurement no clamping error repeated measurement accuracy up to 0.005mm. Designed with 4mm probe for small bore and narrow groove measurement. The lower end swivel part is made of anti-magnetic design. Specifications: Material: stainless steel Color: silver Shank: about 1cm Probe: about 0.4cm Overall length: about 9cm Accuracy: about 0.005mm Package included: 1pc x edge finder 1pc x spring Note: 1. Due to the light difference the item's color may be slightly different from the pictures. 2. Please allow slight deviation for the measurement data and make sure you do not mind before ordering.