Review on Enhance Your Network Connection With Dingsun RJ45 Coupler - Compatible With Cat5, Cat5E, Cat6, And Cat7 Ethernet Cables (Black 10 Pcs) by David Foster

I increased my rating from 2 to 4 after receipt of an email from Dinger the day after this posting. They offered a quick replacement and an apology for the problem. Given the ratings from others, I will assume I received a bad run. In my book a quick response to a problem compensates for a lot.I cannot get any of three brands of RJ-45 connectors to insert into this product. Including the package of RJ-45 connectors that came with it. It will accept with my older pre-made cat 5 cables. I managed to insert one of their connectors and had to use pliers in one hand while depressing the tab with the other hand to get it out. May just be a bad run but returned the product and purchased another brand.