Received today in a secure box. The first inspection shows good thread quality inside and out. However, there are 2 details that need to be provided: 1) This is 6-spline, not 7-spline. I sent it back and looked at the description of the goods, it doesn't say anything and it can't be seen in the pictures. So if you're looking for hard-to-remove (stealing) spline nuts, look elsewhere. The funny thing is, I think some of their other stuff is marked with 7 splines, but I'm too tired to confirm myโฆ