Found these unbranded wire block clamps on eBay and decided to give them a try. While they do work, they do not provide a secure enough connection for me to feel confident in using them. Given that they are used with electrical wiring, the fact that they are sometimes flimsy makes them dangerous to use in my opinion. They are a cheaper version of Wago wire clamps but they don’t provide anywhere near the same level of reliability. I will stick with Wago in the future.