4XEM's 100-Pack of RJ45 Modular Male plugs with gold-plated contacts is for use on Solid or Stranded Conductor Cat6 cable. Contacts are 50 micron gold for optimum signal transmission.Problem it solves: Ready to crimp your own Cat6 cable? You're gonna need some of these. Quality plugs-great price.4XEM gear is respected industry wide for its high performance, premium quality and durability.