it's magnetically attached so it can be knocked off, etc. I got 2 little kids and they'll try to climb it or hit it. But it's cheap enough that if some paint gets chipped off and the base metal (of the tray) rusts it's no biggie.
Looks like a good cheap drip tray. I used a stainless grill smoker box which I got at lowes for $10 and epoxied some magnets on there it works great. You could get a bar mat and cut it to fit in there so the spilt beer has somewhere to drain.