Model # 6758

Internet #100392633

RIDGID 3/16 in. Cobalt Drill Bit

Discontinued RIDGID

3/16 in. Cobalt Drill Bit

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Product Overview

The RIDGID 3/16 in. Cobalt Drill Bit is designed for drilling in metals and is made with the proprietary CG Power process for speed, strength and durability. The 143° split point cuts on contact.



Assembled Depth (in.)
0.375 in
Assembled Height (in.)
6.875 in
Assembled Width (in.)
1.875 in
Bit Diameter
3/16 in
Bit Length (in.)
Bit diameter (in.)
Drilling Depth (in)
Shank Diameter
3/16 in


Bit Material
Color Family
Cordless/ Corded
Drill Bit Type
Drill Bit Type(s) Included
Material Application
Duct/Sheet Metal
Min Chuck Size Required
3/8 In.
Shank Style
Shank Style
Tools Product Type
Power Tool

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Customer Questions & Answers

I need large quantities of these and will need to keep in stock regular monthly usage will be around 50. Please let me know the easiest way to do this

Asked by: Anonymous
I would contact your local H.D. store Pro-Services department regarding bulk purchasing rather than requesting they carry that large amount available in-store for you to buy as needed.
Answered by: RednexToyz
Date published: 2016-07-20
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Customer Reviews

3/16 in. Cobalt Drill Bit is rated 3.7 out of 5 by 16.
Rated 2 out of 5 by from Didn't break... Drilling out some magnetic stainless (400 grade) self-tappers in my grill that I'm converting to propane and a cobalt bit I got from the hardware store went through 24 holes in fresh 16 gauge stainless was still able to drill out two of these rusted screws on the burners. This Rigid bit went through one and took the Phillips pattern off the other three before going completely dull. Used low speed + oil. Got no smoke...the bit should last longer than that seeing as an old bit went through two heads and this one fresh could only do one. Went from screw to screw to negate heat build up in work. Disappointing to see a $4 single bit do so little.
Date published: 2009-03-16
Rated 2 out of 5 by from Hit or miss The quality of the bit was hit or miss. I bought several of the bits because I was drilling 100+ holes through 1/4" steel columns. The first bit worked like a charm, cut over 70 holes before dulling the bit. To finish the project I had to open three more packages to get a second bit that worked as well as the first. Product works great when it works, but it appears that there are quality control issues.
Date published: 2015-02-17
Rated 5 out of 5 by from Finest Drill Bits These cryo treated cobalt drill bits are fantastic. I had a project that had a lot of rivets into 1/8" steel and 26 gauge sheet metal. I started the project with a TiN bit, thinking it would do the job, way too much work. These holes I made were drilled with a corded drill, free hand, standing and kneeling and in awkward positions, so it was hard to keep the drill aligned. After four holes with the TiN bit, I switched to this bit. Over 300 holes later, I was still getting curls, the bit was showing a little wear, but holes were made quickly. If you have to drill metal, use these bits...
Date published: 2015-10-06
Rated 4 out of 5 by from Great for hardened metal drilling Snapped a bolt head while installing a cylinder head on a small engine. Grabbed my cheap Ryobi bits and drilled away. Realized after 10 min. that they weren't going to work. Picked up one of these bits and had a 1/4" deep hole bored into the bolt within 10 min. I was then able to remove the bolt with an extractor. Must have for hardened metal drilling.
Date published: 2013-04-15
Rated 5 out of 5 by from very sharp, cut very well in metal drill bit did the job perfectly cutting into sailboat mast (aluminum)
Date published: 2013-08-27
Rated 4 out of 5 by from good in a pinch Bought this drill bit in hopes it would do better than the mac tools drill bit I ruined. Surprisingly it did pretty well I was hand drilling a grade 10.9 metric bolt (slightly harder than grade 8 SAE) I was ablt to complete the repair.
Date published: 2015-08-25
Rated 1 out of 5 by from Not effective at drilling steel I bought three of these to drill out screws which had become frozen in place in a cast aluminum piece. About 0.15" of screw needed to be drilled. One bit made it most of the way but the other two made little progress before dulling. The Home Depot associates insisted that a cobalt bit would do the job but that was not true for at least this Ridgid brand product.
Date published: 2015-06-11
Rated 5 out of 5 by from Drillbit that actually worked I bought and destroyed 4 Dewalt bits before I bought this one. Not only did it work, but it did all the work with one bit. I drilled over 50 holes In an aluminum frame. I did the same project with Dewalt bits and it took 4 of those to do the same job. It stayed sharp the whole time!
Date published: 2015-06-23
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