Product review (5 stars): Easy to install - instructions below
If you're looking at these, you probably just read somewhere that you need to replace your rubber washing machine hoses with metal ones. You're correct. I researched the crap out of this issue and it's a real thing-get two of these and replace your hoses. This was the easiest thing I've ever fixed in my house. Remember: leftie loosie, righty tighty! I totally forgot that and could not get the old hoses off because I was turning them the wrong way. Yikes.

Turn the water off-probably by pushing a lever behind your washing machine backwards. Turn the old hoses left with a wrench or pliers to get them off, but do it gently because you don't want to break anything. Put the new hoses on, tightly but again don't break anything. Turn the water back on. Huge leaking-rubber-hose-flooded-house crisis averted!