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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Neiko 10194A Titanium Step Drill Bit, High Speed Steel | 1/4" to 1-3/8" | Total 10 Step Sizes

Neiko 10194A Titanium Step Drill Bit, High Speed Steel | 1/4" to 1-3/8" | Total 10 Step Sizes

Product ID: 336255231

Details

Brand
Neiko
Cutting Angle String
135 Degrees
Finish Type
Titanium
Material
Titanium
Shank Type
Straight

€ 56.68

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Sold byAmazon FranceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

Neiko 10194A Titanium Step Drill Bit, High Speed Steel | 1/4" to 1-3/8" | Total 10 Step Sizes : desertcart.in: Industrial & Scientific

Specifications

ASIN	B000FZ2UOY
Best Sellers Rank	#253,206 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1,020 in Drill Bits
Brand Name	Neiko
Country of Origin	USA
Customer Reviews	4.4 4.4 out of 5 stars (6,066)
Cutting Angle String	135 Degrees
Finish Types	Titanium
Global Trade Identification Number	00837013101949
Item Dimensions	15.5 x 7.4 x 4.1 Centimeters
Item Weight	0.31 Pounds
Manufacturer	titanium
Material Type	Titanium
Model Number	10194A
Number of Pieces	1
Part Number	10194A
Shank Type	Straight
Surface Recommendation	Titanium
Tool Flute Type	Spiral
UPC	799198591307 735090625498 837013101949 753956688876 844699046549
Unit Count	1.0 Count

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