The Irwin 373002 is a 1/2" shank hole saw mandrel designed for drilling precise and efficient holes. Made by the reputable brand IRWIN, this drill bit is perfect for professional and DIY projects. The durable construction and high-quality materials ensure long-lasting performance while the 1/2" diameter allows for use with any 9/16” to 1-3/16” 1/2” shank hole saws.