Brand Name: Irwin *Sub Brand: Cobalt *Diameter: 25/64 in. *Overall Length: 5-1/8 in. *Material: High Speed Steel *Product Type: Drill Bit *Shank Type: Straight Shank *Number in Package: 1 pc. *Usage: For Tough Metal Drilling Including Heavy-Duty Abra *Packaging Type: Carded *For Hardened Steel *Discovery ACC, SUP