Model # NKST20

Internet # 203274504

Store SKU # 1000018549

NailKiller 1-1/4 in. x 7-1/2 in. Tube Auger



Model # NKST20

Internet # 203274504

Store SKU # 1000018549

The Bosch Daredevil auger features a dual cutting edge optimized for nail killling and balanced drilling. With reinforced tip and spine, the Daredevil auger can withstand repeated nail hits in heavy-duty applications giving it 3x life vs standard augers. The reamer edge improves entry and exit hole quality.

  • Reinforced tip withstands repeated nail hits
  • Reamer edge improves entry and exit hole quality
  • Dual cutting edges provide easier nail cutting and balanced drilling
  • Reinforced spine adds strength for heavy-duty applications
  • Reamer edge provides improved entry and exit hole quality
  • 9x life with nail hits


Assembled Depth (in.) 
2.18 in 
Assembled Height (in.) 
9.55 in 
Assembled Width (in.) 
2.18 in 
Bit Diameter 
1-1/4 in 
Bit Length (in.) 
Bit diameter (in.) 
Drilling Depth (in) 
Shank Diameter 
7/16 in 
Shank Diameter (in.) 
7/16 in. 
Bit Material 
Color Family 
Color Family 
Drill & Router Bit Type 
Auger & Spade 
Drill Bit Type 
Auger Bit 
Drill Bit Type(s) Included 
Auger Bit 
Material Application 
Min Chuck Size Required 
1/2 In. 
Power Tool Accessory Type 
Other Accessory 
Power Tool Product Type 
Drill & Router Bits 
Shank Style 
Tools Product Type 
Power Tool 
Short Auger Bit 


Individual/Set: Individual
Material Application: Wood
Brand: Bosch
Price: $20 - $30
Bit Diameter: 1-1/4 in
Bit Material: Other
Review Rating: 4 & Up
1 Question1 Answer

Customer Questions & Answers

NailKiller 1-1/4 in. x 7-1/2 in. Tube Auger
NailKiller 1-1/4 in. x 7-1/2 in. Tube Auger

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current auger bit got dull very quickly. how long do you think this one would last going thru headers ?

This question is from NailKiller 1/2 in. x 7-1/2 in. Tube Auger
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March 12, 2016
I run wire into homes so I'm always going thru joists and headers can't decide between spade,auger,installer. I'm going broke any estimate on the good auger bit
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Asked by
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March 14, 2016
Thank you for your question. Bosch Daredevil auger bits have 9 times the life of average auger bits due to a reinforced tip to withstand repeated nail hits. This bit work work well for drilling through headers.
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Rated 4.6 out of 5 by 26 reviewers.
Rated 3.0 out of 5.0 by Heavy duty and aggressive... If you are looking for an aggressive bit that will go through anything, this is it. If you're looking for nice clean holes, this isnt it. Looks like a shotgun blast through the hole, whereas what I need is clean holes. However, if you are looking for something that will last even longer than your typical nail eater bits, this will suit you just fine. April 22, 2016
Rated 2.0 out of 5.0 by Did not work for me Did not work for my application where I was trying to drill a 1/14" hole. March 22, 2016
Rated 5.0 out of 5.0 by excellent in old timber Used this bit to drill through 120 year old timber framing. Went through without a problem. Other bits ww used burnt out after one hole. This onw drilled 6 and still works. Worth every penny. February 23, 2016
Rated 5.0 out of 5.0 by Like it name says, NailKiller It drills quickly and pulls itself through without much effort. It does not have any issues when it hits a nail or screw. It jumps a little but not much. Once you break through you do need to push a little the bit does not self feed ones the screw tip breaks through. May 3, 2016
Rated 5.0 out of 5.0 by Money Maker I bought this drill bit to replace old worn out ones and get my AV business moving forward. I often am running wires through walls and need to create larger or new pathways. This bit makes that job fast & easy! I try to avoid nails because they aren't good for any drill bit, but so far this beast isn't showing any problems. I've used it on a couple of jobs and drilled quite a few holes and expect to use it on a few more at least. I look at all my tools as a job cost. Even if I only use a tool once, if it makes me more money than it costs, it's worth it! This bit earned it's keep on the first job. Now, it's just money in the bank. In my business, where labor rates are at a premium, saving an hour is significant! This bit is one of my best workers! I expect to buy more. August 12, 2014
Rated 5.0 out of 5.0 by The quality you would expect from Bosch I've been happy with most of the Bosch drill bits I've used over the years, and so far this is no exception. It's tip lets you start your drilling location precisely, and it drills easily through wood. The base that attaches to the drill is hex-shaped rather than round, so you know it the drill will grab it without slipping. This drill comes in a nice plastic case you can use to store it in, so it won't be rubbing against other things in your tool box. One thing to be aware of is that the total length of this drill bit is 7.5". You're going to loose about 1.5-1.75" of that into your drill for holding it, and there's about 0.75" at the tip used for starting the drilling process, so you can only go a little over 5" deep for actually drilling a 1" hole. Also note that the maximum-rated speed for this bit is 600 RPM. January 13, 2015
Rated 5.0 out of 5.0 by Bosh 1" Auger This is one will do the job if you need to drill a 1" hole and if you happen to run in nail it will cut it like it wasn't there. The case that it comes with is nice. It's reusable and keeps if from bagging around in your tool box. Can't wait to use it again in my next bathroom project. March 1, 2015
Rated 5.0 out of 5.0 by Easy to use The fiberglass insulation was really easy to use AND it did not fly apart as it often did in the past when installing. Also, the guy in the store helped me to figure and advised on which type I needed, size, and told me not to buy higher rating because all I had were 2 x 4s so I needed the R13. When I finished I had less than one piece left and even with the metal roof you can hear a pin drop in a heavy rain storm. Main thing is the quality of the people working at Home Depot. June 11, 2014
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