The thread is made of sturdy metal and can be very good screw on lens.
Additional filters can be screwed into the internal thread, even with thick fingers thanks to folding problem.
Also the lens cap can be put on easily.
The panel itself is made of comfortable Gummie which unwrap after a little smells, micht personally does not bother.
The build quality is good, although small burrs are available, but you have already but look carefully.
In my case, can the panel fold on the lens. Whether they are or not decreases, saving space in both cases!
In summary: functional, practical, yet very inexpensive!
