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These connectors are listed as Cat 6 & Cat5e rated. They are not. This connector is actually Cat5e only. The barbs in the connector, which pierces the individual cable conductors, are in a straight line. The barbs should be staggered for Cat6 use (Cat6 barb ends are at different heights; every other barb is higher.) For Cat6, there also is a 2nd plastic piece that helps route the conductors to the correct staggered barbs. This will be important, only if the equipment you are connecting, are rated for Cat6. You probably won't meet spec, if these connectors are used.. If you are running a Cat5 or 5e network, then this should not be an issue. Also, it does reference in the description: 'RJ45 Stranded Modular Connectors'. This means that you should be using this connector for Cat5e cable that has stranded wire conductors. Which usually means patch cords only. (solid wire conductors require a different style barb) Normally, solid wire conductors are used for in-wall use only. (which means jacks).