This technique includes :Wheel Hex 2pcsWheel Lock 2pcsM4x2.5x15 Screw Pin 2pcsProduct major functions & usage:1. Linking the CVD towards tires obtaining the capability and lead a smooth drive.2. Lock and provide the wheel tightly.Major programs of upgrading towards part/product:1. Created from a light product high tensile energy aluminum 6061 T6 for great sturdiness.2. Initial degree is 4.5mm, this component is upgraded to 10.5mm for wider wheel track that will help run efficiently and a lot more stable.3. The hex are manufactured to claw in tires tightly and firmly.4. Original capped design to avoid sand and dirt through drive.5. Initial knurling procedure towards interior component for tight locking.