@sally @lucy @Paradox Twisted pair is in fact quite hard to crimp if you don't have the kind of connectors that lets the wires protrude out the end and easily be trimmed, or if the connector doesn't mate well with your crimp tool.

Hand crimping is only good up to 1000BASE-T - a hand crimped cable will not work with 10GBASE-T unless you get it absolutely perfect.


USB 2.0 cables can be repaired via soldering (although is often hard due to how thin the wires most usb cables use are), but good luck soldering back together a usb 3.0 or higher cable and having something that does more than 2.0.