This BNC / Coax Twist on Male Plug are special promotion for CCTV installers. Use this male BNC twist on terminator for RG59 Coax cable or RG59 18/2 Siamese cable. It's quicker and easier to use than crimp style, and no special tools are required. Additionally, the body/housing is made of nickel plated phosphor bronze and contacts are made of brass. Really brand new, professional grade and top quality!