Features:

Made of high quality metal

Easy to install and durable

It can extend the wheel distance

Specifications:
Item name: 12mm Hex 25mm Coupler
Material: Metal
Axle Hole diameter: 5.5mm
Hex Size: 12mm
Inner Diameter of the Nail: M4
Color: Blue/Black/Red/Purple
Hex: 12mm
Extension: 12/15/20/25mm (Optional)
1 Set: 4Pcs
Package weight: 37g
Suitable for: AXIAL SCX10 D90 AX10 CC01 F350