It's just a metal connector that prestresses the insulation of the two wires that fit inside and a plastic case, so I don't see the need to buy more expensive ones. Haven't tested the connection with a continuity tester yet, but the connection looks solid. You can fill the cavity with silicone grease which can probably make it weather resistant like these wire connector type knobs. Pliers require some strength. It is designed to be squeezed with ordinary pliers or slip-joint pliers, which have more mechanical advantages. The cap is meant to be pushed in only and prevents the metal connector from shorting to other metals. It's not for squeezing a metal fork.
High-Quality 14AWG Braided Speaker Wire (15 Feet) With Dual Gold Plated Banana Plugs - Oxygen-Free Copper (OFC) Construction For Superior Sound - Black
15 Review
Asiahorse 16AWG Pro Power Supply Sleeved Cable For Power Supply Extension Cable Wire Kit 1X24-PIN/ 2X8-PORT (4+4) M/B,3X8-PORT (6+2) PCI-E 30Cm Length With Combs(Dual EPS Black)
14 Review
GoPro HERO9 (CHDHX-901), 23.6MP, 5120x2160, 1720 mA, black
32 Review
High-Quality BENFEI DisplayPort To HDMI Cable For Seamless Connectivity Across Lenovo, HP, ASUS, Dell And Other Brands!
18 Review