Check the listing for details. Lufkin 890 Machinist 180 Degree Protractor Tools. Condition: Used. Listed at 16.00 USD. The Lufkin no. 890 Machinist 180 Degree Protractor is a precision tool designed for metalworking inspection and measurement tasks. With a unique 180-degree design, this protractor allows for accurate and efficient measurements in various industrial settings. The durable construction and reliable performance make it a valuable tool for professionals in the CNC machining and metalworking industries.