Review on ZOENHOU Bi Metal Cutting Plastic Galvanized by Jason Mitts

These crowns may seem cheap, but don't let that fool you. They're probably tougher than you or your drill bit. I had to install a dryer vent through aluminum trim and a 3/4" pad and was surprised that the 4" hole was perfect in every way. After the saw cooled I checked the teeth and it didn't look like there were many. Signs of wear The paint has peeled off, but that's the only sign of wear that impresses me.