6 Pieces Stainless Steel Bore Brush in Different Sizes Twisted Wire Stainless Steel Cleaning Brush with Handle 1/4 Inch Hex Shank for Power Drill Impact Driver, 4 Inch in Length

Pretty much breaks with any amount of pressure applied. Almost all of them broke

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They break off easily.

Not a terribly robust design, but they do what they are supposed to do. I have worn out two so far, using them to get rust out of a complex piece of metalwork with a lot of crevices and corners. I have may leaned too hard on one, which after about 20 minutes snapped off at the base of the brush. I wore out the bristles on another one. But, they did the job a wire brush is supposed to do.

I needed to clean out some rust on a few threaded holes. These bore brushes did a great job of getting the rust out but after some vigorous use there was some breakage on the bristles. No complaints on the value because the rust in the threaded holes was 7 years old but that did drop the durability score to 4 stars.

They worked great at first but then the brushes started to break off. Works good as lo as they work and not break

I ordered these to use for cleaning the bore on brake caliper slide pins. Ive only used them twice and theyve worked perfectly both times. Makes the work so much easier.

just what was needed to work on a pressure pump

I am on a small project to re-conditioning all my house shower faucets with 27 years of calcium build up. So I bought this to use with my cordless drill and was able able to do this clean up in less than 5 minutes! what a time saver for sure! My only problem that I realized is these brush bits are bit short. but removing plumbings inner pipe calcium was easy and fast, including grinding down the inner part of the shower spout was peace of cake.

These are pretty flimsy and break quickly they are not a great buy.