The designers at Peterson have taken the task of broken key extraction very seriously. Because of their designs, the use of better steel and production techniques they have single sided extractors with delightful key gripping power plus the incredible "wet or dry" hands on holding power of their handles. They listened to the locksmith when designing these tools.The new two sided "pliers" or "scissors" are absolutely wonderful. These patent pending tools will out-grip and outperform any other pliers type product on the market today. Period. And while they were designed for automotive work, we are receiving reports that they also work very well on many single sided key ways.