Package quantity: enough quantity to fit on a skateboard or longboard and improve bearing performance Speed spacer: our skateboard spacer allows you to rotate the axle nut downward all the time, thus reducing slop and increasing bearing life, durability and performance;The +/ -0.02 mm precision tolerance ensures nicely fit and very fast bearing at a time Speed rings: our speed rings can increase speed and extend longer bearing life by reducing friction among the bearing, axle nut and hangar Axle nuts: our axle nuts prevent your wheels from falling off, the more you change your wheels and bearings, the more the axle nuts wear out and lose its tightness; These standard size axle nuts keep you locked up and fit most skateboard/ longboard trucks with 8 mm axles (in fact, each truck has a standard 8mm axle size); These axle nuts have thread dimensions of 5/16 inch Wide application: this skateboard tool kit can be applied for most skateboard/ longboard trucks, they are strong and with proper installation, are to stripping Effectively:The skateboard hardware set can reduce slop and increase the , durability and performance of your bearings. Essential for your skateboard wheels, get this kit, bring much convenience to your life. Quality material:Our truck longboard hardware kit is made of iron, which is and stable, , and not easy to strip, you can use it for a long time. Colour:Silver+black Material:iron Package Contents: 8 x Skateboard spacers 8 x Axle nut 40 x Speed ring Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.