Last Chance Square Up High-precision squaring device and arrow spinner tool;Features an adjustable diamond insert for squaring arrow shafts or inserts;Diamond insert offers longevity and can be used hundreds to thousands of times;Includes high-quality, smooth bearings for consistent performance;Precision milled tool ensures accurate results;Allows spinning of any shaft to check straightness;Included in the package: 1 Square Up, 2 Lag Bolts, 2 Washers