HIFESON Rivet Nut Tool Hand Nuts Riveter Rivnut Tool Metric and SAE with Step Drill Accessory for Stainless Steel Nuts M3 M4 M5 M6 M8 M10 10-24 1/4-20 5/16-18 3/8-16 (Stainless_Steel)

These rivet nut installers are awesome. I used them on an inner fender to mount my winch switch and they did the job perfectly. They come with a step drill bit which makes the job so easy.They are small in size so they work really well in tight spaces and that’s what I had. Drill the right size hole and install the rivet nut on the tool and a couple of wrenches and tighten it up and then unscrew the tool from the rivet nut and the job is done.

Items is quality and works as expected

Whoever invented rivnuts is a genius because this is exactly what I needed to install 3” caster wheels on bottom of steel frame baby lounger. I didn’t want to buy the big rivnut tool because in tight spaces, I won’t have room to use the tool and so I liked this tool because I could use a drill and can work in tight spaces. I’m sure if I was installing rivnuts a lot, I would get the tool.So this kit does the task. And I REALLY want to give it 5 stars but I had to knock off a star for two reasons:1) the step drill only goes to 12mm despite the product description picture clearly showing 13mm which is needed for M10 and 3/8-16 size threads which as it turns out is what I need for those aforementioned 3” caster wheels. Thankfully I had a 1/2” drill bit (12.7mm, just shy of the required 13mm needed) that I was able to manipulate by angling the drilling (be careful!) and then using a hammer to pound the rivnut+mandrel in. Not exactly the most professional but it got the job done and you can’t see the non-perfect hole once the rivnut is installed.2) I have FOUR, yes 4! different sets of ratchet sets, hex wrenches etc + a gazillion Allen wrench combinations and NONE of them was the right size for that big fat 3/8-16 mandrel. Thankfully I eventually found a correct size Allen wrench without having to make a trip to the store or waiting another day for Amazon delivery. Perhaps I don’t have ALL the size tools that others do, but since ALL my other tools fit EVERY other mandrel BUT the 3/8-16 one, maybe a heads up in the description/picture or better yet, use hex head for the bolt instead since that’s a more ubiquitous fitting that people have laying around if they are undertaking this task. So yah, I had to do it manually and my poor thumbs are sore. And no, I didn’t have random 3/8-16 bolts around that I could have substituted out.All in all though, this kit got the job done and I’m happy with it and will put this to good use in future.

Below are tips I have learned from using this tool. Related to smaller size M4 and below.Installation process:1. Grip the large nut with a wrench. Hold the wrench to prevent the large nut from rotating. The large nut has a bearing inside to prevent the rivnut from rotating during the tightening process.2. Thread the rivnut onto the bolt. Get it finger tight. Finger tight will be the starting point for step #3.3. Use an allen wrench (or equivalent tool) to tighten the bolt 2.0-2.5 full turns (720-900 degrees).4. Done.Exceeding 2.5 turns will result in:- Bolt breaking- Head stripping- Warped threads from too much upward pressure inside the rivnut.Recommended add-ons:- Extra strong socket head bolts. McMaster item 91290A176 has grade 12.9 steel. Treat the M4 bolts as a consumable item. Need to replace an M4 bolt every 5-10 rivnuts. One can pull the old bolt out of the large nut's bearing fairly easily.- Wiha 71397 hex bit set has excellent tolerances to prevent cam-out. Make sure to have a socket wrench that fits the Wiha bits. The socket wrench will provide enough leverage when tightening the 2.0 - 2.5 turns.Additional info:- I wanted to find an M4 bolt with a hex head (instead of a socket head). A hex head bolt (tightened with a regular socket head driver) could handle the torque much better than a tiny hex insert bit. Unfortunately I couldn't find an M4 hex head bolt with high strength steel.- Do NOT use an impact driver on smaller M4 sizes! Need to hand tighten M4 sizes. I broke so many M4 bolts with an impact driver.- Other reviewers have pictures of broken bolts. This was from tightening past 2.0-2.5 turns.- Using the steps above will work with stainless steel rivnuts. Don't need to get brass, although I'm sure brass is a little more forgiving.- Overall, I am impressed with the tool. The stepper drill bit included in the box was a big help also.

They’re WAAYY OVERDUE!! I have the big tool to attach it!! But this bypass the big tool!

I have never used rivet nuts before, so I chose this kit because it has almost everything needed to use them, (you have to supply an open end wrench and an allen type wrench). It arrived with the plastic case badly broken and unusable. More importantly the step drill bit shown in the picture goes up to 13mm which is needed to install the largest rivet nuts in the set. My set had a bit with a maximum size of 12mm. I returned the set and promptly received a replacement but the second set also had a 12mm max. drill bit.I know from experience that when you drill thin material with a twist drill bit, where you can't back it up with a scrap of wood, you will probably end up with a jagged, irregularly shaped hole. A step bit solves that problem. Amazon lists pages of step bits but I could only find 1 with a 13mm step and it cost as much as this entire set. I have a step bit with a 1/2 inch (12.7mm) step. I will practice on a scrap of sheet metal to see if I can get it to work, maybe with a bit of jiggling.On the same order when I bought this kit, I bought some eye bols with short studs. I want to install them on the inside wall of my truck as tie rings to attach bungie cords to.I would have rated this kit 5 stars if it had had the correct drill bit.

works great