11/16 Cobalt Drill Bits - 3 Pack - 6 Inch Length - M35 Cobalt Drill Bits with Storage Case - Perfect Drill Bits for Metal, Hardened Stainless Steel, Cast Iron, and More! About this item 3 PACK OF 11/16" COBALT DRILL BITS - 11/16" Diameter with a Flute Length of 3" and Total length of 6" M35, FULLY GROUND, 135 SPLIT POINT - Our Drill Bits Contain 5% Cobalt, Are Fully Grounded for a Precision Drilling Diameter. 135 Split Point Design Makes it Easier to Drill Repeated Holes in Harder Materials. PLASTIC STORAGE CASE INCLUDED - Incredibly Tough and Durable Plastic Case. Perfect for Keeping Your Cobalt Drill Bits Neatly Organized and Safe. COBALT DRILL BITS ARE THE PERFECT DRILL BITS FOR METAL - As well as other hard materials such as Stainless Steel, Hardened Steel, Cast Iron, Bronze, Titanium, and More! NARWHAL GUARANTEE - We strive to source high quality products and if you're ever unsatisfied please reach out to us, our USA Based Customer Service is here to help!