[David stewart]

When taking the pole out of the van at one of the customers, I was checking the brush head for any dirt etc and on one of the edges where the plastic had worn rubbing against the wall I saw two spots where metal was coming through
Eventually got what was a heavy duty piece of wire pulled out of it with the pliers, not going to mention any brand name but obviously the offending item had fallen into the mould where the plastic brush heads are set.
Luckily I don't use the edge of the brush to scrape off bird crap as I see some do, would have left a world of scratches haha 

[PoleKing]

Sounds like an old Brodex brush.
They used to put the bristles in rings before setting them in the head.

[SeanK]

I always inspect a new brush after getting one with a metal jet sticking through by about 4mm.
Luckily I noticed it before scrubbing any glass.

[jarvy]

Was not aware the was metal in a brush.
Good heads up, thank you.

[Alex Gardiner]

Most of the WFP brushes on the market are staple-set - this means that each bristle bunch is fixed into the brush stock with a stainless steel staple.

It is probable that because of extended abrasive wear on the edge of the brush you had exposed one of the fixing staples used in the construction of the brush.

Checking equipment for structural integrity before use is of course always a good idea and usually forms part of a Method Statement or Risk Assessment of works.

[H20cleaning]

NEVER EVER use the corner of the brush to scrape bird poop unless you wet the window first and make sure bristles are under the brush head before using the corner of it

[David stewart]

Most of the WFP brushes on the market are staple-set - this means that each bristle bunch is fixed into the brush stock with a stainless steel staple.

It is probable that because of extended abrasive wear on the edge of the brush you had exposed one of the fixing staples used in the construction of the brush.

Checking equipment for structural integrity before use is of course always a good idea and usually forms part of a Method Statement or Risk Assessment of works.

In other words I've been a tight git with this particular brush head Alex lol

[Clever Forum Name]

I am sure we had metal showing on a dual trim brush from gardiner on a corner.