This split lock washer provides a circular bearing surface with offset split ends which help bite into the mating material to provide a locking feature when tightened beneath a nut. It is round with a hole in the center and can be used where loosening from corrosion or vibration is a concern. Lock washers are commonly used in any application using a bolt where two pieces are being drawn together. The package size designates the inner diameter of the washer. Used in applications with like nuts and bolts of similar diameter as well as screw products. Available in various materials and finishes.