The straps come with two rivets.One rivet with the hole for the cutaway cable,the other with a screw to fix it on the helmet.(use screw thread locking fluid medium)...
TFX Scratch Protector Sticker Kit reduces the damage on the helmet shell and it is highly recommended tothose who use TFX helmet in the tunnel. Please check Tonfly's tutorial video for correct installation:https://www.youtube.com/watch?v=6lCmQoufTLs&t=1s..