The product is IRWIN Cylinder shank au2o3 Cobalt HSS Lh 305 mechanics length drill bit, 1 3/4 in 2 flute, 1/4 in. Gold Oxide finish. 2 flutes. Cutting diameter 1/4".Features Constructed of M-42 8 percent cobalt high speed steel for super abrasive resistance in tough metals Heavy duty spiral flute design produces faster chip ejection Shorter cutting tips reduce torque for drilling in high tensile strength materials 135 degree split point reduces feed pressure for easier penetration without work hardening Specifications Manufacturer : Hanson Brand : Hanson Item Weight : 0.8 ounces Product Dimensions : 3.4 x 0.2 x 0.2 inches Item model number : 30516 Is Discontinued By Manufacturer : No Manufacturer Part Number : 30516 ASIN : B002YKJ3CU Customer Reviews : 5.0 out of 5 stars 1 rating 5.0 out of 5 stars Best Sellers Rank : #738,399 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #18 in Mechanic's Length Drill Bits Date First Available : June 16, 2009 Material : High Speed Steel Item Dimensions LxWxH : 3.4 x 0.2 x 0.2 inches Finish Type : Gold oxide Tool Flute Type : Spiral