Accuracy: +-0.00005" Three matched angular contact bearings with factory-set preload support the primary load area of the point. Special spindle-like point extends into the shank where it is supported by a needle bearing. This design substantially increases rigidity, reduces point deflection and dampens vibration. Bearings protected by a combination steel shield and neoprene seal. Point is high-carbon alloy steel heat treated to Rc 61 - 63. Included point angle is 60 °s;+15'/-0. Bearings permanently lubricated. Reduced knockout diameter prevents taper from mushrooming. Low profile head for tool clearance. Bearing life significantly extended with the exclusive Royal Roto-Shield(TM).