Description:- CNC processing- Type:XT60, XT90 holder (optional)- Decrease the power supply cable length Reducing the vibration of mulitrotor to power line, also shortens the supply power line. Small but good effect.- Only a holder, not included the plug connector.-Diameter of the installation hole: XT60:21mm; XT90:29mm-Size of screw: M2.5*6 Package Included:1 x CNC Holder 2 x Screw