I was hoping that these nuts with thread M4, but they were much smaller. I can not say it disappointed me (in any case they come in handy). This immediately should be attributed to the shortcomings of the description. It needed to be more detailed, it will allow the user to do a custom tool. Quality nuts raises no objections, it is very good. But for the price of nuts probably a bit much, but also shipping costs. Weight nuts too overvalued.