NEIKO 04204A Hex-Head Multispline Screw and Bolt Extractor Set, Easy-Out Screw Extraction, Broken Bolt Remover, Stripped Fastener Tool, 1/8 Inch to 7/8 Inch in 1/32-Inch Increments, CrMo, 25 Pieces

Life saver. Don’t know how long the drill bits will last but the extractor bits seem pretty good. I was able to remove a bolt that was broken off, and one that the head was stripped and I already tried slotting with a cut off wheel. Both on a 2009 Yamaha YFZ450R.*** HAMMER THE EXTRACTOR BIT IN, and hand crank with a crescent wrench or something similar.I also use this brand for bits and they are great.

I bought this set over a year ago and it has been amazing. I’ve used a wide range of the sizes and they’ve all worked for me. Most notable for me is the 1/8 size extractor; I had to use it to extract 56 screws out of an aircraft windshield and the picture shows it after that. Has some wear but I can still use it. Definitely has given me my moneys worth.

The media could not be loaded. Works, but use caution on something critical.Working on a head gasket job, I had two bolts that broke off. One was in the cylinder head (BAD) where the front pulley mount attaches and the other was in the heater hose attachment going into the manifold.You will need a good center punch.First treat the piece to be extracted with some lubrication to aid in assistance.Second use a center punch to make a good divot in the center of piece to be extracted.Third, find the smallest drill bit relative to the size of the piece to be extracted and start drilling counter clockwise. Go to the next size drill bit higher if that doesn't work.If that still doesn't work, drill a 1/8" of an inch depth hole. Place desired tapered extractor into the hole and slightly tap in with hammer. Slowly rotate extractor counterclockwise by hand. You will need to use a wrench to assist. If it still isn't moving, you must make a choice to stop or proceed. I CHOSE TO PROCEED AND BROKE THE EXTRACTOR TIP OFF INTO THE HOLE!! VERY BAD!!! NOW I have a major problem. It has taken me 3 hours to remove the broken extractor and now my original hole is much bigger. Hopefully, I will be able to re tap and use a heliocoil to fix this.Verdict.It definitely works as seen on my posted video. The smaller broken bolt came out with ease using only the left handed drill bit. However, the extractors work but seem pretty weak and should not be trusted using tremendous force. Just be careful folks. When you break one off, you are in for a long ride!If you screw up like me, look up a heliocoil to fix your mess.

Great kit for the price. Withstood a pounding from my 1/2in impact and dug in to a very rounded allen bolt. As long as you’re patient these work phenomenally. Now the only trouble is to separate the hardware from the extractor.

Terrible experience with first use. Tried multiple drill bits with no luck. Hardly put a scratch on the bolt. (I’m not stupid. I know how a LH drill bits works.) Had to use a bit from another set. But then I broke off the extractor with minimum force. Poor quality. Complete opposite of helpful. I tried to save money by buying this set and it cost me more time, money and effort in the long run.

I think I'm very good about preventing rounded heads on fasteners, but even so, it still happens on occasion. I bought this kit to remove some M6 allen/socket head bolts that had seized in place on an engine pulley and they were a pretty soft grade 8.8 bolt. In hindsight, more penetrating lubricant and time or some heat and a hammer probably would have helped, but I was impatient that day.The reverse thread drill bit worked as good as I could have ever asked. I made sure to keep the drill bit going in straight, speed relatively low, and occasionally stopping to clean chips and lube the drill bit and it quickly cut through the bolt making very nice chips.The extractor on the other hand, leaves more to be desired. I tapped in the extractor with a hard plastic mallet and used an adjustable crescent wrench to turn. The bolt did finally make a "snap!" and came out, but two other things also happened. The extractor, surprisingly, is a somewhat soft metal metal and twisted a little during removal. I'm honestly surprised the extractor hasn't twisted apart yet, as it has twisted about 20° right where the extractor goes into the head of the bolt, and this is only after two bolts. In addition to twisting, the extractor bent about 2-3°. This is possibly due to me using a crescent wrench instead of a tapping wrench, but not nearly as big of an issue as the twisting part.All in all, it's still a pretty incredible value that you can get this entire set for so cheap. Definitely not what you want to get if you want something to last decades, but excellent for quick fix.

So far they are GREAT. I only used them once to get rusted brake bleeder bolts out. Easy use and lasted 4 bolts without any deformation of the teeth