Features:
Sizes: inner diameter 4.1mm, outer diameter about 9mm.
Material: Made of iron electroplating, smooth appearance, durable and long service life.
Applicable to: M3 fastening holes on the side, which can lock the shaft position.
Function: The clamping set is also called wheel lock, wheel gear. When installing the wheels of the car model and airplane, the wheel lock is used to lock the inner limit or the periphery of the wheel, and the line or the axle of the landing gear can be locked to ensure that the wheel does not fall off while rotating.
Warm reminder: Rigid type basically does not allow eccentricity, and must be fully adjusted during use.

Specifications:
Color: Silver.
Material: Iron Electroplatin.
Sizes: inner diameter 4.1mm, outer diameter about 9mm.
Style: Appearance garland.

Note:
Due to the light and screen difference, the item's color may be slightly different from the pictures.
For manual measurement, there may be an error of 0.3-1mm, thank you for your kindly understanding.

Package included:
5 PCS x Retaining Sleeve.