I purchased this set for my hobbies. Within ten minutes of use, the one bit began to round off. I was using the bit straight on and I was not attempting to use it like a ball style hex head. This metal is soft as butter. There was no reason for it to round off that quick or at all. The bolts I am using are top notch stainless hobby bolts so the bolts are not the cause. Like most Chinese products, they look good until you use them.
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