Product Details

Cobalt Steel Drills
Super Duty Cobalt Drill Bits for drilling hard metals.

Cobalt Drills are the best choice for stainless steel and other difficult-to-drill alloy applications.

135-degree split-point for quick penetration and reduced walking . M-35 Cobalt steel for increased heat resistance and longer life. Heavy Duty construction.

Tech Specs
Size (inches)Decimal EquivalentFlute Length (inches)Overall Length (inches)
5/64.078112
3/32.09371-1/42-1/4
7/64.10941-1/22-5/8
1/8.12501-5/82-3/4
9/64.14061-3/42-7/8
5/32.156223-1/8
11/64.17192-1/83-1/4
3/16.18752-5/163-1/2
13/64.20312-7/163-5/8
7/32.21882-1/23-3/4
15/64.23442-5/83-7/8
1/4.25002-3/44
17/64.26562-7/84-1/8
9/32.28122-15/164-1/4
19/64.29693-1/164-3/8
5/16.31253-3/164-1/2
21/64.32813-5/164-5/8
11/32.34383-7/164-3/4
23/64.35943-1/24-7/8
3/8.37503-5/85
25/64.39063-3/45-1/8
13/32.40623-7/85-1/4
27/64.42193-5/165-3/8
7/16.43754-1/165-1/2
29/64.45314-3/165-5/8
15/32.46884-5/165-3/4
31/64.48444-3/85-7/8
1/2.50004-1/26
17/32.5314-13/166-5/8
21/32.6565-3/167-1/8

Reviews for Cobalt Steel Drill Bits

3 of 3 Reviews

April 23, 2012

Cobalt drill 3/32"
By cjb from Old Saybrook, CT

Bought several of these expecting them to break or dull quickly, have to admit one bit did the job drilling through a lot of hard steel. Pleasant surprise to be fully satisfied with this purchase.

Bottom Line Yes, I would recommend to a friend

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August 28, 2008

Very high quality[...]
By Chip from North Idaho

Good product, Quick [...], Fair cost, Good company response. I'm very pleased overall.

Bottom Line Yes, I would recommend to a friend

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August 25, 2008

Best for stainless steel
By Cliff from Onset, MA

I needed to drill additional holes in my SS pulpits. Ordinary HSS drills didn't work for beans. The cobalt drills were the only ones that worked.

Bottom Line Yes, I would recommend to a friend

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