[Upgraded Special Design]20Pcs RG59 BNC Compression Connector with fixed pin, you can insure the center wire goes into the connector more , easier and quickly,doesn't get bent, other raditional bnc connector. Connector was very easy to to -59 coaxial siamese cable, just the coax cable core insert the compression connector pin and compress it. [How to Crimper ]Please make the tool for the measurement for these connectors,then tighten the connectors with cable, making the connection successfully is easier. 20PCS BNC Compression Connector works with standard compression . [Widely Application]RG59 connector suitable for in the cctv home security systems camera installation, theater, audio & video cable, made to work in any weather condition, for indoor/outdoor . with all CCTV analog, AHD, TVI and SDI home security high-definition camera surveillance system. [Weather Resistant] Heavy-duty constructed DC barrel BNC connectors HD video cables for reliable coaxial RG59 720p, 960P, 1080p CCTV AHD and SDI coax HD video cables connection. Extremely low signal attenuation construction, -corrosion -plated, All metal fully sealed-watertight,improved conductivity, permanent connection never comes loose. Colour: as shown Material: Metal Package Contents: 20 x RG59 BNC Compression Connector (with 20Pcs Copper Pin) Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.