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  • Greenlee 34403 Multi-Hole Step Bit, 7/8"
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Greenlee 34403 Multi-Hole Step Bit, 7/8"

18 customer reviews

List Price: $68.24
Price: $32.91 + $5.17 shipping
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Only 1 left in stock.
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Hole Sizes From 1/8-Inch through 1-3/8-I...
  • Enter your model number above to make sure this fits.
  • Unique split tip design penetrates through steel faster
  • Resists walking or skidding
  • Balanced, double-flute construction requires less pressure
  • Hole Sizes: From 1/8-Inch through 1-3/8-Inch (3.2 - 34.9-mm)
  • Capacity: cut up through 3/8-Inch (9.5-mm) mild steel, copper, brass, aluminum, wood, plastic and laminates
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Frequently Bought Together

Greenlee 34403 Multi-Hole Step Bit, 7/8" + Greenlee 30008 Multi-Hole Step Bit, 1-1/8"
Price for both: $87.86

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Product Description

Size:Hole Sizes From 1/8-Inch through 1-3/8-Inch (3.2 - 34.9-mm)

Product Description

Unique split tip design penetrates through steel faster. Resists walking or skidding, even on round surfaces. Balanced, double-flute construction requires less pressure, does the work for you. Multi-hole step bit.

From the Manufacturer

Greenlee has been going strong for more than 145 years and continues to be the preferred brand of tools and equipment for the electrical contractor. From hole making and bending to test and measurement, you can depend on Greenlee tools to outlast and outperform the competition every time. The Greenlee 34403 has a unique split-tip design that penetrates through steel faster. It is resistant against walking or skidding, even on round surfaces. It has a balanced, double-flute construction that requires less pressure and basically does the work for you. It's also designed and manufactured in the USA.


Product Information

Size: Hole Sizes From 1/8-Inch through 1-3/8-Inch (3.2 - 34.9-mm)
Technical Details
Part Number 50344030
Item Weight4 ounces
Product Dimensions3.5 x 6.8 x 1.3 inches
Item model number34403
SizeHole Sizes From 1/8-Inch through 1-3/8-Inch (3.2 - 34.9-mm)
ColorGreen
Materialmetal
Item Package Quantity1
Warranty DescriptionLimited service warranty
  
Additional Information
ASINB000N5NF7M
Best Sellers Rank #128,226 in Home Improvement (See top 100)
Shipping Weight5.6 ounces (View shipping rates and policies)
Domestic Shipping Item can be shipped within U.S.
International Shipping This item is not eligible for international shipping. Learn More
Date First AvailableNovember 9, 2004
  
Warranty & Support

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.
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From the Manufacturer

Greenlee Step Bit

Loaded with features

The Greenlee step bit design has several features and benefits. 1. They offer a unique split-tip design to provide faster penetration that resists walking or skidding. 2. The deep double flute design requires less operator force, provides efficient chip removal and adds to an increased cutting speed. 3. The Greenlee step bits are made from a hi-grade tool steel with a steam oxide coating allowing for a longer tool life. 4. The dual cutting edge improves the tool balance and cutting speed, providing a consistent tool performance. 5. Lastly, our step bits are manufactured in the USA.

Drills through most Metal

Greenlee step bits are engineered to drill through 10 gauge mild steel, copper, brass, and aluminum, as well as wood, plastic, and laminates. Drill hole sizes ranging from 13/16-inch (4.8-millimeter), 1/4-inch (6.4-millimeter), 5/16-inch (7.9-millimeter), 3/8-inch (9.5-millimeter), 7/16-inch (11.1-millimeter), 1/2-inch (12.7-millimeter), 9/16-inch (14.3-millimeter), 5/8-inch (15.9-millimeter), 11/16-inch (17.5-millimeter), 3/4-inch (19.1-millimeter), 13/16-inch (20.6-millimeter) all with only one 3 9/16-inch (90.5-millimeter) bit. Minimum chuck size 3/8-inch (9.5-millimeter).

Split tip design resists walking

Greenlee step bits are designed with the user in mind. Our unique split-tip design resists walking and makes the tool safer and more accurate. Plus, our bits are designed with two flutes which not only cut faster and easier to reduce strain but also allow the tool to run cooler.


Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews

5 of 5 people found the following review helpful By A. Pierpoint on January 23, 2013
Size: Hole Sizes From 1/8-Inch through 1-3/8-Inch (3.2 - 34.9-mm) Verified Purchase
If you know stainless, it's a bit of a pain to drill a hole in, it quickly gets work hardened if it overheats. I decided to spend the money on this Greenlee step bit to drill my holes in a few stainless kegs for my port's and valves.

I made a pilot hole first, and the key is to use moderate pressure at a slow drill speed with plenty of lubricating oil on the drill bits to keep them cool.

Take it slow and don't let it get too hot or you will kill your drill bits and harden the stainless steel.

The Step bit made easy work of the holes I needed to make, and left very little burred edges to clean up. Don't make the mistake of buying cheap bits hoping to save a few bucks, you are likely to ruin your keg if you are not used to working with stainless.

A quality product for the purpose I used it for.
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4 of 4 people found the following review helpful By njkmonty on September 1, 2012
Size: Hole Sizes From 1/8-Inch through 1-3/8-Inch (3.2 - 34.9-mm) Verified Purchase
dont bother with cheap junk ones, this step bit is fantastic,
have tried many other brands in australia, even one i paid $90 for locally, it went blunt in 3 holes, this bit went on to do over 100 and still going stron.
only problem is i have to wait a bit for them to arrive in australia!
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2 of 2 people found the following review helpful By Pash on August 15, 2012
Size: Hole sizes from 7/8" through 1-3/8" Verified Purchase
I bought this along with the Greenlee 730BB-13/16 Standard Round Knockout Punch Unit, 13/16-Inch to create some holes in my brewing kettles. Along with some cutting oil, this product works really well. It's a little pricey, but I know this think will last, just make sure to use oil.
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1 of 1 people found the following review helpful By J. Pan on January 15, 2012
Size: Hole sizes from 1/8" through 1-3/8" Verified Purchase
I bought a pair of Greenlee step drill bits several years ago, and bought two more this time because the bit worked so well. We built a variety of frames and structural supports using stainless steel, Uni-strut, rebar, aluminum, and cast iron. Once the pilot hole is drilled, this step drill cuts thru them almost like butter. The first 1/2" step drill probably lasted over several thousand cutting before the edge became dull. Because the cutting edge is so sharp and hard, it takes a little getting used to when the drill is new. If you push too hard, the hole can get bigger than you intended to be. It's best to use it on a drill press with preset depth if possible. This drill bit his highly recommended.
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1 of 1 people found the following review helpful By Steve Stamos on September 24, 2011
Size: Hole sizes from 1/8" through 1-3/8" Verified Purchase
You can't buy any uni-bit better than a GreenLee. The reason I say this is because this is the ONLY bit that's fluted on both sides. Most other unibits have a single flute to extract the metal shavings. The greenlee has two, so that means less resistance on your cuts and faster drilling because the metal can escape the dill bit faster.

I've been using greenlee uni-bits for 10 years and only replace them every two-three years, and i use them daily on steel and aluminum drilling for electrical work.
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By SJK on July 15, 2015
Size: Hole sizes from 7/8" through 1-3/8"
I've had one of these larger Greenlee 36414 step bits for several years and it's still working fine. I use it mostly on steel and nonmetallic electrical boxes for enlarging existing K.O. holes, but it can also be used for making new holes. It has a range from 7/8" to 1-3/8" which corresponds to standard entry hole sizes for 1/2" through 1" electrical conduit. The bit is made in the USA from very good quality steel and seems to still be holding an edge even after quite a lot of use. I find that a beefy 1/2" cordless drill is almost mandatory to use this bit, especially with the larger hole sizes in heavier gauge steel, or else the bit can bog down and even stall a smaller drill. As with anything with the Greenlee name on it, the price was a little hard to swallow, but in this case the quality is there, so I think it was worth the expense and wouldn't hesitate to buy again when needed.
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Size: Hole sizes from 7/8" through 1-3/8"
I have had my Greenlee Step Bit (unibit) for over 7 years. Drilled over a thousand holes. My bit is still sharp and works great. It was made in the USA and you can tell. I have seen knockoffs that look like the Greenlee version, but they are junk. I have never had to pre-drill either.. I have drilled up to 1/8' steel with this even though you aren't supposed too, and it still looks like new. It is the only Step Bit I keep in my box because it has all the common electric knockout sizes.
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Size: Hole sizes from 7/8" through 1-3/8" Verified Purchase
I was given a damaged 5 gallon keg by a friend and intended to turn it into a heat exchanger, but to do that I needed to put a few holes in it. In the past when I needed to drill into metal I have worked around having to buy a step bit. Boy am I glad I did, it makes clean and precise whole very easily.

No more work-arounds for me.
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