Review on Muzata Completely Invisible Turnbuckle Swageless by Eric Nallamothu

They are made of quality material but most importantly they don't have written instructions which is good. They have a video in the description showing how to install them but it is 100% wrong. Don't use a 10mm bit a little over 3/8 bit for installation if you live in good ol' USA. Additionally, you'll need about 9/16 or a little more to fit their tool they sell in the hole. Once you do that, their round lids that they sell don't close the hole because they are too small. Just an overall bad combination of products. This tool also doesn't work well when the turnbuckle needs force to screw in, it just slips.