The product includes : Hex Adaper Cover-4pcs Hex Socket Screw 19mm-4pcs 5mm Metal Washer-4pcs M4x2.5x13 Screw Shaft-4pcs Handbook quantity: Product major function & use:
1. Extend the wheel-base by widening the width associated with the hex. 2. Self-lock design provides better stability when driving and switching. Quality parts with modern CNC appearance and easy to use with satisfactory upgrade performance. Cannot use on original wheels, ONLY appropriate wheels with 17mm hex.
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