I use these several times a week to inspect electonic components for damage and debrees, from headphone jacks to Dock and power connectors... I can say that they are of good quality and feel great, made of metal and a solid weight; However, after some heavy use, they fall apart. I'm talking about excessive daily use as a technicians tool; Throwing them in a drawer or toolbox after use, dropping them, exc. the plastic ear piece gets very loose, is not secure and starts to fall out so I lightly superglue them in place immediately after opening. There is a plastic lense that falls out sometimes and once that's lost, it's time to toss and buy another.