Them includes : Hex Adaper Cover-2pcs Hex Socket Screw 19mm-2pcs 5mm Metal Washer-2pcs M4x2.5x13 Screw Shaft-2pcs handbook amount: device major function & use:
1. Extend the wheel-base by widening the width concerning the hex. 2. Self-lock design provides better safety whenever driving and switching. Good quality elements with modern CNC appearance and a simple task to make best use of with satisfactory update performance. Cannot usage on initial tires, SIMPLY worthy of tires with 17mm hex.