There are a number of good bits that will help you reach and work into those hard to reach places. With the exception of the stainless steel sealing tool, almost everything is made of plastic. I got this to work in my pool and found that it wasn't as convenient as my bathroom remodel due to the restricted access angles and I was also dealing with some large gaps. To be fair this wasn't really a fault of the product, I just wanted to use it for an application it wasn't ideally designed for. This can be very useful when fitting out the interior and makes work easier.
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