Rannb Metric Feeler Gauge Gap Measurement Tool 300mm/11.8" Long 17 Blades 0.02-1.00mm Thickness

Update August 2019:These gauges are still working fine for me but the ones that I use regularly are pretty corroded. The corrosion is a very thin layer so this is still fine for setting the gap for my 3D printer nozzle. I suspect that you are not supposed to wipe off the excessive amount of oil that is on them. The next time I buy a set of these, I will check to see if someone makes a stainless steel version.Original Review:I bought these to calibrate the nozzle height on my 3D printer (using .08, .09, .1). They work great for my purpose and the extra length makes them easy to use. They attach to the handle with a screw + plastic nut. I removed the ones that I use regularly so I don't have to hold the whole set all the time. I checked the accuracy of them with a cheap pair of digital calipers and they checked out. Not sure how precise these are for those that need more precision that I do.The only negative is that they are very oily -- I assume to prevent corrosion or maybe this is just from manufacturing. I cleaned them off with alcohol to avoid getting oil on my printer build surface.

Update: doh, that is, why didn’t I see something this obvious earlier: Just undo the bolt that holds the blades in the handle. Lay them out on a paper towel and use a couple more to remove the oil. They work fine Older: Looked ok, but were covered in oil. I’ve bought plenty of other small metal items - files, measuring devices - from amazon and they all came wrapped in VOC paper, never in oil. I imagine the oil coating is a better rust preventative, but I need to measure violin string clearances next to the nut in tenths of a millimeter and I don’t need any oil residue contaminating the fingerboard. Rather than spending time laboriously scrubbing every piece of oil from every single feeler blade, I’m going to return this and try to find one that is shipped dry. Otherwise they looked like what I needed.

The overall quality is not bad for the price. I'm very glad to have finally went ahead and got a set of metric only gauges. Just having the blade marked in whatever the Imperial translates to in metric is generally not helpful at all. So these fit the bill. Accuracy is fair to poor. Some I found to be +/- .01-.02mm. My calipers aren't precision machinist grade, however when I check my 30 year old Craftsman feelers with them, they normally right on. So I trust them somewhat. I wasn't sure if I'd like the extra length on these, but after a little time using them, I found it helpful. Especially when trying to work through various sizes to measure an existing gap. They arrived with a serious coat of oil on them. I'd wipe them down of course. But resist the urge to use any solvents or anything else to completely remove the oil. I'm guessing they'd start rusting something fierce.

These are great for bed leveling on my 3D printer. The machine oil on them isn't ideal for keeping the bed clean, but it's necessary. The gauges are a bit floppy toward the small end, but what do you expect?

Long as well you know. But they work and have a great reach of course. They are oily at first but I know that’s to keep the rust down bit it seems a little excessive

I wish there was a .035 and .045 but if you look at the picture it shows sizes and you could double them up , to get the between sizes I like the length , it's best to have short and angle sets to , depending on application .

The upside: They ARE Feeler Gauges and seem to be good quality. The downside: First time using them, fresh out of the box, the pin fell out of the pivot and all the gauges fell out and, many of them, are now behind/below my tool cabinet/bench. Absolute pain!

I use these when I level the bed on my 3D printer. When checked with a caliper, the thickness’ appear true, but it’s a cheapo caliper so YMMV.Well made, easy to read.