anti-static record cleaning arm


I have seen these "dust bugs" on ebay and other iterations of the same. LP gear has an "anti-static record cleaning arm."

Have not seen any discussion of these devices in this forum and am wondering if they have any benefit. The prices are certainly cheap enough for a try.

thanks
dmgrant1
Post removed 
I used the Decca carbon fibre brush of that type years ago. It did catch dust before it could get to the stylus. I could never verify the claims made for it that it took static electricity away from the record through the ground wire provided tough. I'm certain purists and others affected by audio nervosa could very well be of the opinion that it affects speed stability, but I seriously doubt that a lightweight brush used with any decent turntable would cause such a problem.

I would stay away from cheaply made brushes of this type or anything that has a plush roller or looks to be too massive.
thanks for the responses.

What is the problem with carbon fiber brushes, as I have been using one? If there is a problem I would like to know.
I have a rather sophisticated one made in France called the "Rexon C." Has gimbal/bearings on weighted base, adjustable height and counterweight, "tonearm rest," its head (replaceable) combining a carbon fiber brush and some fluffy stuff, plus a drain wire. It was a gift, so I don't now how much it cost and all the instructions are in French, but I like it a lot. Dave