Do these hold up to heavy use on stainless steel?

Sadly to say that it does not hold up to stainless steel. I am an Exterior Electrician and ordered a bunch of these for my guys to use out in the field. It did not work on our Exterior panels nor on our Transformers the first, second or third time. The bits gave out and dulled as soon as they started drilling. We ended up purchasing high end step-bits we've ordered before and they worked well. I did a trial with these bits and ended up short on the winning end.

Drilling a 1 1/4" hole in a stainless steel sink? Any suggestions?

The best and cleanest option to punch a hole in a stainless sink is with a hydraulic Greenlee hole punch. They are expensive to own. You might want to see if you can rent a set.

What size is the shank

Hi Randy,The 3/16"-1/2"(six step drill) and the 1/8"-1/2"(thirteen step drill) both have 1/4" shank. The 1/4"-3/4"(nine step drill) has a 3/8" shank. Hope this will help you?

does this drill bit fits into the Black and Decker 3/8" 5-amp Variable Speed Drill with Keyless Chuck, DR260B

The shaft is 3/8 on the tool but, it is tapered so the drill chuck jaws can bite down so it will hold on to it, I have used it in my 3/8, 1/2 and my 1/2 mill, with no problem, I hope this helps you!

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Description

🔨 Drill Your Way to Perfection!

⚡ SPEEDY EFFICIENT - The 2-flute design ensures fast cutting and automatic deburring for a cleaner finish.
💪 HEAVY DUTY DURABILITY - Crafted from high-speed alloy steel with a titanium coating for long-lasting performance.
🔧 VERSATILE PERFORMANCE - Perfect for wood and metal projects, this drill bit adapts to your needs effortlessly.
📏 EASY SIZE IDENTIFICATION - Engraved sizes from 1/4" to 1 3/8" make switching between tasks a breeze.
🔄 MULTI TOOL COMPATIBILITY - Fits securely in most drills, making it the go-to choice for any DIY enthusiast.

The NEIKO10194A Titanium Step Drill Bit is a high-quality, multifunctional tool designed for both wood and metal projects. Made from #4241 high-speed alloy steel and featuring a titanium nitride coating, this drill bit offers exceptional durability and performance. With 10 different sizes engraved for easy readability and a 135-degree split-point tip for precise drilling, it’s perfect for both professionals and DIY enthusiasts alike.

Specifications

Material	Tri-Flat Shank
Finish Type	Titanium Nitride
Shank Type	3-Flat
Cutting Angle String	135 Degrees
Brand	Neiko
Tool Flute Type	Spiral
Minimum Bore Diameter	0.38 Inches
Surface Recommendation	Aluminum,Copper,Plastic,Stainless Steel,Steel
Manufacturer	Ridgerock Tools Inc.
Part Number	10194A
Item Weight	5 ounces
Country of Origin	China
Item model number	10194A
Is Discontinued By Manufacturer	No
Size	1/4 to 1-3/8"
Color	Titanium
Style	Straight
Finish	Titanium Nitride
Pattern	Drill Bit
Item Package Quantity	1
Cutting Diameter	0.25 inches;1.375 Inches
Measurement System	Inch
Included Components	Titanium Step Drill Bit Set
Batteries Included?	No
Batteries Required?	No
Assembled Diameter	0.25 inches;1.375 Inches

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