From Loctite we supply you with the proven screw locking paste. Simply apply it to the thread, under exclusion of air the agent hardens and thus prevents screws and nuts from loosening or vibrating out by themselves. A must for all 4 stroke tuners. Ideal for securing wheel nuts, etc. By the way, if you use Loctite you don't need to mount spring washers under the screws anymore. Attention: Please be careful with the high-strength locking paste, it is difficult to dismantle with normal tools (has to be heated up to 300 degrees).