It appears to be a reasonable quality as I would expect from Silverline. It is a self assembly item, so be aware, it's not difficult to assemble butI did expect it to be ready for work. I haven't tried it out yet, but the "Dry run" seems ok, I has an adjustable bar inside that the "flapper" strikes. I'm guessing that with experimenting I'll figure out the setting, and why there is a cover with a square hole in it.