The product is a lot of 4 new drill bushings from the AA Bushing Company. The specification for the bushings is #51×13/64×1/2 Type H. These drill bushings are designed for use in CNC, metalworking, and manufacturing industries for precise and reliable toolholding and workholding. With a high-quality construction and accurate specifications, these drill bushings are essential components for efficient and accurate drilling operations in various industrial settings.