They are perfect for my job (burglar alarm and CCTV technician). I use them almost every day for low voltage wiring. You can't beat the price and I wouldn't recommend any other brand. Dolphins (blue or white) are great and just work. I prefer the blue ones as they have gel sealant in the connector (compared to the white ones which don't) making it harder for water and such to get into the connectors. Detaches easily and usually holds up well if you need to reuse it after the connection is fixed. I love her. I will only use Delphin connectors.
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