Review on Uxcell 100Pcs M3X4Mm Internal Stainless by Shawn Xayamonty

At first glance these set screws look pretty cute. But I would look elsewhere. Unless you like being teased. The M3 screw heads I bought fit a 1.5mm hex bit. However, they are processed with fairly large tolerances. Several screws were removed right out of the box. And for those who didn't "pull ahead," their heads literally popped out after a few cycles of buttoning and unbuttoning. These things are tiny. So it doesn't look like they're even being used in some high torque applications. They're just brittle/soft. I'm glad I tested them first before using them in my finished parts. I would be very careful using them in applications where you don't have any alternative means to extract them.