Let me start by saying these hydraulic oil service plugs are a game-changer for anyone dealing with leaks or quick hose changes. The variety in sizes (35 pieces across large, medium, and small) means you're covered for almost any scenario.

The rubber material feels surprisingly durable - I've used them multiple times on my tractor's hydraulic lines without any signs of wear. They create a tight seal that stops leaks immediately when you're mid-repair.

What really impressed me was how easy they are to use. Just push them in and twist slightly - no tools needed. I recently used the medium size to plug a hydraulic line while replacing a cylinder on my backhoe, and it held perfectly until I was ready to reconnect.

The only minor drawback is that with very high pressure lines, you might get minimal weeping - but for temporary work, they're fantastic. At about $0.50 per plug considering how many uses you get from each one, they're definitely worth having in your toolbox.

Pro tip: Keep a few in your truck's glove compartment - they've saved me from messy oil spills more than once when a hose unexpectedly let go on the job site!