These are much better built in couplers than others I have used in the past. Let's just say built-in connectors aren't high tech, but I like them because they're better made than the ones I've used before. They just feel more durable and the lines connect tightly, while the others I've used just feel very cheap and the lines don't always connect tightly. Also, I save more money by buying a pack of 10. I've seen other online sellers charge $2 to $3 for just one clutch!
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