... 10mm, better to prevent the damage of tires. 6.Double security :this product operates with the heterogeneous rocking handle ,there is no ... , injecting oil inside to prevent rust processing, static electricity spurts with the high brightness plastics powder outside. 9.It has spikes ... moveable of the cover nut,, which can fits all the tires with the diameter below 80cm.12.It adopts the rocking handle ...