INSTALLER BIT 1/2X18" *Brand Name: Diablo *Drill Size: 1/2 in. *Overall Length: 18 in. *Product Type: Installer Bit *Shank Type: 3-Flat Shank *Number in Package: 1 pk *Packaging Type: Carded *Flute Length: 3 in. *Finish: Black Oxide *Discovery CON, SUP