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15,192 reviews
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Jobber Drill Bits
Experiential insights by users
About AIMLENTOOL 13Pcs Cobalt Drill Bit Set
Overall Feedback:
95% positive
92% appreciated its precise drilling accuracy, though 8% experienced deviation
The drill bits listed as Cobalt Drill Bits Set, M35 HSS, 135 Degree Tip, Twist Jobber Length Drill Bit Kit for Hardened Metal, Cast Iron, Stainless Steel, Plastic and Wood were not suitable for steel, as I found out.
92% praised for its fast drilling speed
These cobalt bits perform well on stainless, cold-rolled steel, and 6061 aluminum due to their sharpness.
93% liked its long-lasting durability, but 7% experienced frequent breakage
I have noticed that cobalt bits are more brittle than HSS, which means they might break easier if used in a hand drill.
Cobalt bits are more brittle than HSS and might break easier if used in a hand drill.
93% liked the comfortable grip design, while 7% found it slippery
I have noticed that cobalt bits are more brittle than HSS, which may cause them to break easier when used in a hand drill.
Cobalt bits may break easier when used in a hand drill due to their brittleness compared to HSS.
I questioned if the drill bits are suitable for Cast Iron or Stainless Steel.
93% found it resistant to heat buildup
I cut through the stainless screws like drilling in aluminum with the drill bit and it never even got hot.
92% praised for its versatility in drilling various materials
These drill bits are sharp enough to perform well on stainless, cold-rolled steel, and 6061 aluminum, and strong enough to cut well on hardened steels.
I drilled out 24 stainless steel screws with a set of disposable bits. Surprisingly, the single drill bit I used cut through the screws like drilling in aluminum, proving the bits' versatility in handling different materials.
The drill bits listed as Cobalt Drill Bits Set, M35 HSS, 135 Degree Tip, Twist Jobber Length Drill Bit Kit for Hardened Metal, Cast Iron, Stainless Steel, Plastic and Wood were not suitable for steel, as I found out.
I have commented on the poor quality control of the drill bits. The smaller bits were terrible while the larger bits seemed passable.
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