Material: Stainless steel
Package:4 pcs M9

Light weight, high strength, no rust.
Comes with non-slip lines, effectively lock and slip, protect the frame.
Made of high quality stainless steel to prevent rust.
There is a wide flange at one end of the flange nut, which can be used as an integrated non-rotating washer.
Distributing the pressure of the nut on the parts to be fixed reduces the chance of damaging the parts and reduces the possibility of loose parts due to uneven fastening surfaces.