Review on 2Pcs Isolated Switching Power Supply Board: Universal AC DC Converter Module 110V 120V 220V 230V to DC 5V 12V (DC 12V 1A Version) by Leonardo Sandoval

The 5V board is good. Xacto simply removes the perforation. I've seen a lot of cheaper components come this way. I would recommend that the manufacturer take the risk of splitting when packaging for a few extra pennies rather than drinking an American who breaks them apart like Dorito and then having your resellers pay to send back "broken" leads ( this can easily be remedied by the way). I've only used one of the boards so far and I love the size. It fits on my jigsaw and along with the 5v red line laser lens gives the impression that I'm not drunk on my weekend projects, crooked cutting boards and the like and gets a very thin and noticeable cut line. Cheap components, mediocre circuitry. , a lot of noise under load and the recommended capacity. Although this is China for you. The US needs to invest more money in component manufacturing.