I don't always have access to common cable/electrical supply shops. So when I place and order with Security Camera King I try to stock up on some things I may need so I'll have them on my truck. I used these for the first time the other day and I was impressed. I may not have needed to do it, but as an added measure of insulation, once my cables were all connected I wrapped it all with black electrical tape. Works good!

I ordered these with another purchase. The order arrived fast. The connectors are good quality. Use these to split off any BNC feed.

I used this for adding a spot monitor to one of my cameras. Since I already had the cables with connectors all I had to do was hook it up. I haven't noticed any degradation of signal, no interference, etc.