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The Cobalt Extra Long Drill Bits Set includes 5 high-speed steel drill bits, each 12 inches long, designed for precision drilling in various materials including stainless steel, plastic, and wood. Made from M35 cobalt steel, these bits offer enhanced durability and wear-resistance, featuring a fully ground design and a 135-degree split point for optimal performance.
A**N
Great bits at a good price
They have seemed to keep an edge for a surprisingly long time through black iron pipe and numerous aluminum beams! I would buy again if I need more.
S**N
Good quality
Good quality and does a good job
A**S
Good
Good little bits
B**N
A Little Pricey, But They're the Real Thing. Probably Hard to Find Locally.
Bits like these are incredibly useful when you're drilling thicker metal. Genuine cobalt bits like these with the dull gold finish last much longer and cut a lot faster than any imitations. They cost accordingly, but it's not a good value to break 3 or 4 inferior bits trying to do the same thing one of these will.The bits come in a nice storage case (albeit a bit oversized, it could hold 30 or 40 of these bits as easily as 5). They are packed in a bag and oiled to prevent corrosion, a nice touch.I really like the 6" length. This is the first I've been able to find longer cobalt bits and I'm glad that Amazon has made them available at a fair price, you probably won't find these at the big box store or even most hardware stores locally.I try to always keep several sizes of these on hand, because I usually end up needing them when in the middle of some auto repair project or something similarly frustrating. This way I don't have to go to town when the need arises. Great bits, fair price. If you drill metal, just get them.
J**N
Not Useful against Steel
Very first Drill the tip on the 1/8 bit the tip chipped off making it useless. The next sizes did make it through 1/4" steel but barely on only one hole. Packed them back up and returned them. Replaced with local L hardware store with their cobalt bits that just drilled right through steel like butter.
L**T
Held up well against dense materials
Had trouble with other bits breaking off while drilling through Trex decking boards. Broke 5 in one day with another brand in fact. This brand held up great over multiple days and hundreds of holes going through that dense material. Bits handled the high friction heat well and zipped through those boards.
K**R
Great little drill bits
Exactly what I was looking for. I really appreciate the case that they come in; keeps them from getting broken.
H**N
These actually were not too bad
They worked very well on soft Carbon steel. Didn’t do well against Hardened stainless steel. So I guess they’re not exactly what they say
Trustpilot
1 day ago
1 month ago