Brand Name: Milwaukee *Material: Hardened Steel *Shank Diameter: 3/8 in. *Product Type: Hole Saw Arbor *Number in Package: 1 pk *Quick-Change System: No *Vendor Internet Sales Policy: Sale of this product on third-party online marketplaces(eg. Amazon, eBay, Walmart) is prohibited *Discovery -  Express, Convenience,  Core,  Super,