The product is a pack of 750 1-1/4 inch Serrated Flat Head Star Drive Backer-On Screws, model number 23406. These screws feature a flush seat serrated head design and are driven by a star-shaped bit for added security and gripping power. With a brand name of BACKER-ON, these screws are perfect for various industrial and fastening applications where reliability and durability are important factors.