Customer Reviews for Drill America 5/32 in. x 6 in. Cobalt Aircraft Extension Drill Bit

Drill America 7/64 x 6" drill bit met my exceptions. Very good quality. Would buy again.

I ACTUALLY used the #6 bit and it went thru a grade 10.9 bolt with no problem/ well done !

Broke after drilling 5 holes.

The bit works well for its intended purpose.

Excellent drill bit.

Jobber drill bit is the right size. The pkg material turns out to be nice also.

Rating provided by a verified purchaser

Exactly what I needed. I needed a bit longer than the normal length of a 7/64th bit and this worked perfectly

Perfect for my needs,

11/164 drill bit....excellent quality for the price....

Work very well, sharp and longer than most in stock items from the hardware section of the store. They were delivered in half the time stated. Overall, good choice.

Drill bit was sharp, durable, and just the right length for what I needed.

Have not used this drill bit yet.

Very good and strong enough.

was perfect for the job.

Went through 1/8" stainless steel (316) plate like butter, but go slowly and use 3 in 1 oil or similar to help cooling. If you haven't drilled steel, I recommend checking online about drilling techniques. It's easy, you'll get the job done fast and the bit will stay sharp and last a long time. The cobalt seems to make the difference.

Rating provided by a verified purchaser

Broke after drilling only 2 holes. Was drilling the 3rd hole and wasn't able to get the depth I wanted. Pulled out drill bit to check and half of the bit was gone.

After the initial 2 or 3mm it stopped drilling. Apparently it lost its sharpness almost immediately.

Exceptionally well made & most impressive.

Needed a long bit. This worked out fine.

Getting dull only after 12 drill on wood

very good.