Purchasing Ethernet cables can be quite expensive and pre-made lengths are not always the length you need. Making Ethernet cables is easy with a box of bulk Category 5e Ethernet cable and RJ-45 connectors that are attached to the cut ends of your preferred cable length.
1: Cut into the plastic sheath about 1 inch (2.5 cm) from the end of the cut cable. The crimping tool has a razor blade that will do the trick with practice.
2: Unwind and pair the similar colors.
3: Pinch the wires between your fingers and straighten them out as shown. The color order is important to get correct.
4: Use scissors to make a straight cut across the 8 wires to shorten them to 1/2 Inch (1.3 cm) from the cut sleeve to the end of the wires.
5: Carefully push all 8 un-stripped colored wires into the connector. Note the position of the blue plastic sleeve. Also, note how the wires go all the way to the end.
6: A view from the top. All the wires are all the way in. There are no short wires.
WRONG WAY- Note how the blue plastic sleeve is not inside the connector where it can be locked into place. The wires are too long. The wires should extend only 1/2 inch from the blue cut sleeve.
WRONG WAY - Note how the wires do not go all the way to the end of the connector.