Just glad I tried them out first before starting on an expensive piece of stainless. Drills can be re-sharpened without affecting their performance. 135 Split point tip enables bits to bite workpiece quickly, reducing the need for centre mark. Fully ground HSS with 5 Cobalt makes these ideal for drilling extra hard materials. HSS Cobalt Split Point Fully Ground Drill Bit Set 19pc Metric AK4701 Sealey Ne. Sealey AK4701 19pc Metric Cobalt Drill Bit Set. The cobalt blend improves resistance to heat and abrasions for increased strength and long life. I suppose at my age I should have known better than to purchase a set of Cobalt drills for £25 when well-known brands were going for twice the price. The KANGO 19PC Cobalt Drill Bit Set includes 19 bits ranging from 1mm to 10mm. The case may be metal but here is gaping hole in the top (so you can see there are drills inside?) which allows the smaller drills to come out unless a great deal of care is taken during transport. So I can only conclude that these are very poor quality or there is a manufacturing fault. Yes, I may have bent one or two but never snapped any but the smallest diameters. I have never in my life snapped drills of this size (I've been using drills for more than 40 years). 4.4 out of 5 stars 25 product ratings Expand: Ratings. Sealey Tools Cobalt Drill Bit Set 19pc Metric AK4701. To my astonishment, both drills snapped where the plain shank meets the fluting. Find many great new & used options and get the best deals for Sealey Tools Cobalt Drill Bit Set 19pc Metric AK4701 at the best online prices at eBay Free shipping for many products. I was using a DeWalt cordless drill and controlling the speed and feed carefully. Tried 5.5 mm and 6 mm diameters to enlarge a pilot hole through a piece of bronze only 12 mm thick. Find many great new & used options and get the best deals for sealey ak-4701 cobalt drill bit set 19-pc metric at the best online prices at eBay Free shipping for. Do not buy.Bought this set primarily for drilling Stainless Steel but thought I'd try them out on something easier first. Just glad I tried them out first before starting on an expensive piece of stainless.Ī waste of money. I suppose at my age I should have known better than to purchase a set of Cobalt drills for £25 when well-known brands were going for twice the price. The case may be metal but here is gaping hole in the top (so you can see there are drills inside?) which allows the smaller drills to come out unle ss a great deal of care is taken during transport. 135° Split point tip enables bits to bite workpiece quickly, reducing the need for centre mark. Yes, I may have bent one or two but never snapped any but the smallest diameters. Fully ground HSS with 5 Cobalt makes these ideal for drilling extra hard materials. I have never in my life snapped drills of this size (I've been using drills for more than 40 years) - Sealey AK4701 HSS Cobalt Split Point Fully Ground Drill Bit Set 19pc Metric. To my astonishment, both drills snapped where the plain shank meets the fluting. § Best Rothenberger Superfire 2 Torch with Solder Mat & 15-22mm Pipe Bender/Cutter Set Reviews. Tried 5.5 mm and 6 mm diameters to enlarge a pilot hole through a piece of bronze only 12 mm thick. § Best Rolson 48710 25pc Titanium Drill Bit Set Price § Best Rolson 55409 Knee Kicker and Carpet Installer Reviews § Best Rolson 59154 HSS Mini Tap and Die Set (31 Pieces) Online. Bought this set primarily for drilling Stainless Steel but thought I'd try them out on something easier first.
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