There is no other way to know whether it has 8% of cobalt or not. There was a problem adding this item to Cart. It's very disappointing to expect what you paid for but receive the ole bait & switch. Drill America D/A29J-CO-PC 29-Piece Cobalt Drill Bit Set contains 29 m42 Cobalt Drill Bits sizes 1/16" - 1/2" x 1/64" increments Sizes: 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 15/64", 1/4", 17/64", 9/32", 19/64", 5/16", 21/64", 11/32", 23/64", 3/8", 25/64", 13/32", 27/64", 7/16", 29/64", 15/32", 31/64" and 1/2". D/ACO cobalt drill bits are made of heat resistant m42 cobalt. The Drill America Brand, 1/8 in. The "A" in the part number means they are made in america. just wish they would fire some of them for being stupid but not much chance in that, Reviewed in the United States on May 5, 2017, just what I wanted drill bits that can drill bolts out. Short, rugged construction performs well in high tensile strength materials like PH stainless steel, Inconel, and titanium. Drill America M42 Cobalt Drills are effective in drilling tough, high tensile strength materials like stainless steel, Inconel, and titanium. INTOO Drill Bit Set 21 Piece 1/16"-1/2" Hex Shank Drill bits Quick Change Impact Dr... Hymnorq Metric 1mm to 10 mm Straight Shank M35 Grade Cobalt Steel Jobber Length Twi... Sheila 5 Pcs Set (6, 6, 8, 10, 12mm) Tungsten Carbide Tip Drill Bit Set for Tile, C... KOWOOD HSS Step Drill Bits & Automatic Center Punch 6 Pcs Set with Titanium Coated.... 13 pcs Cobalt Drill Bit Set, 1/16"-1/4" M35 HSS Metal Drill Bits for Steel, Stainle... THINKWORK Step Drill Bit, M35 Cobalt Spiral Groove & HSS Titanium Coated Straight G... INTOO Industry M2 Drill Bit Set,21Pcs Titanium Drill Bits with Golden Ratio Tip,Pat... To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Top subscription boxes – right to your door, © 1996-2020, Amazon.com, Inc. or its affiliates. It came directly from Drill America too! They are ground to a heavy-duty 135° split point which insures that you can drill without a pilot hole. This bit did a great job cutting harder metals such as stainless steel, titanium and nickel alloys. Drill America 29 Piece M42 Cobalt Drill Bit Set in Round Case (1/16" - 1/2" X 64ths), D/ACO Series 3.9 out of 5 stars 41 $122.55$122.55 Get it as soon as Thu, Aug 13 Effortlessly grip the set in one hand as you would a travel coffee mug or leave it in the cup holder of your truck while on the way to a job. Effortlessly grip the set in 1 hand as you would a travel coffee mug, leave it in the cup holder of your truck while on the way to your job or hang it on your belt when all hands are on deck. 80. Please try again. There are just some drill bit sizes it pays to have made with cobalt alloy. The Drill America Brand, 1/8 in. For use in a wide range of materials in the iron and steel families such aluminum, iron, stainless steel and other hard metal drilling. Use plenty of cutting oil and they eat right thru at low speed. It was worth the additional cost for me since I plan to use these for many years to come. I have found on the job or at home, the 1/8-inch drill bit is the most used and abused bit of the bunch. The D/ACO cobalt drill bits are made of heat resistant m42 cobalt, which is 8% cobalt and the highest-grade material used for cobalt drills. These are the nicest bits i've ever bought. Haven't sharpened one yet. Drills: 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 11/64", © 1996-2020, Amazon.com, Inc. or its affiliates. Drill America D/ASTCO Series Screw Machine (Stub Length) M42 cobalt drill bits are manufactured to National Aerospace Standard 907. Review the pictures below. just wish they would fire some of them for being stupid but not much chance in that. Reviewed in the United States on October 19, 2020. Good drill bits otherwise. $34.89 $ 34. Drill America M42 Cobalt Drills are effective in drilling tough, high tensile strength materials like stainless steel, Inconel, and titanium. Made of m42 cobalt. Drill America Cobalt Drills are are effective in drilling tough, high tensile strength materials like stainless steel, Inconel, and titanium. There was an error retrieving your Wish Lists. Find helpful customer reviews and review ratings for Drill America 29 Piece m42 Cobalt Screw Machine (Stub) Drill Bit Set (1/16" - 1/2" x 64ths), D/ASTCO Series at Amazon.com. Not what I expected for an expensive, supposedly "Cobalt" drill set. Drill America - KFD29J-PC 29 Piece Heavy Duty High Speed Steel Drill Bit Set with Black and Gold Finish in Round Case (1/16" - 1/2" x 64ths), KFD Series, Bosch CO14B 14 Pc. Reviewed in the United States on January 13, 2020. Drill America D/A29J-CO-PC 29-pc Cobalt Set. Don't waste your money. "A" in the part number for American made. Some bits were replaced with inferior bits. I've had these nearly a year. Drill America D/ACO Cobalt Reduced Shank Drill Bit. They make these bits with M42 cobalt steel so they drill really well without heating up quickly. There's a problem loading this menu right now. Read honest and unbiased product reviews from our users. Cobalt M42 Drill Bit Set, Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs), Muzerdo 110PCS Standard Sae and Metric Bearing Steel Tap and Die Rethreading Kit, Viking Drill and Tool 44150 SP-29 Type 240-UB 135 Degree Split Point Magnum Super Premium Jobber Drill Set (29 Piece), IRWIN Screw Extractor/ Drill Bit Set, 35-Piece (11135ZR), General Tools 167 Professional Tap Wrench Set, HORUSDY 131Pc Thread Repair Kit, HSS Drill Helicoil Repair Kit SAE，1/4" 5/16" 3/8" 7/16" 1/2". Compared to a conventional 118 degree tip, these drills wont go "walking" on you. After using the 1/2" to drill thru 1/8" mild steel about 20 times, 1/4" aluminum a dozen times, and lots of 2x4 pine wood, it doesn't look like it has hardly any wear at all.