Bought a set (4pcs) of these wheel bolts along with a set (4pcs) of "official BMW" bolts. Bapmic bolts look and feel (weight) the same as BMW bolts. I even looked at both brands with a magnifying glass and they are identical. So what is my point of view? I'm pretty sure there is little to no difference between the two brands. Bapmic bolts fit perfectly on the 2014 BMW X3.