For accurate checking of concentricity on cylindrical workpieces. Bench Center Tolerances... Center Height: 0.0006" Bed Flatness: 0.0003" Center Parallelism to Bed: 0.0004" Center to Center Alignment: 0.0002" Bench Center Specifications... Height: 5.9" Length: 29.50" Weight: 106 lbs Part Centers 15.75" Dial Indicator not included. 5/8" x 60° MT2 centers are hardened and precision ground.Tail stock center is spring loaded and lever operated.Heavy Duty cast iron bed for added stability. Shipped via truck ONLY