Features BETTER MATERIALS By using high quality metal and ABS materials, the torsion protractor is very durable for long-term use. Rotary Tester: adapter gauge for torsion wrench, used to measure the rotation angle after pre-torsion in torsion angle applications. WITH CLEAR SCALE The 360 degree scale is marked in increments of 2 degrees and at intervals of 10 degrees and 30 degrees. EASY RESET Easy to zero for another application by turning the tool housing, which is convenient for use. FLEXIBLE WORKING - Includes adjustable grab bar, features two lengths that provide flexibility and stretch. Specification: Item Type:Torsion Protractor Product material: metal, ABS Features: 1. The scale is clear, accurate and easy to read. 2. Providing services for many new engines that use torsion to manufacture fasteners. 3. The adjustable arm has 2 different lengths and is flexible. Package list: 1 x torsion protractor. 1 x L bar Package List 1 x Torsion Angle Gauge 1 x L Rod