I am making a button box for sim racing and they fit perfectly in the plastic junction box. They had some black foam from the case stuck to the Beats, but that comes off. That's why I gave it 4/5 stars - I didn't have to clean or scrape the parts, but in the end it wasn't a deal breaker. The hole punch worked great on plastic - didn't even need to use a smaller drill bit - just punch a hole and you're done.