STEP DRILL BIT 15STEPS *Brand Name: Diablo *Drill Size: 1-3/8 in. *Overall Length: 2-29/32 in. *Material: Metal *Product Type: Step Drill Bit *Shank Type: 3-Flat Shank *Number in Package: 1 pk *Packaging Type: Carded *Shank Diameter: 3/8 in. *Number of Steps: 15