These are dji S800 crash parts - MultiWiicopter.com recommends you keep these with you when travelling or flying on mission critical ops (where you only have one aircraft)
S800 Spreading Wings dji part No.5 - Frame Arm Clockwise "X"
One naked frame arm with bare wires - requires soldering - marked by Clockwise symbol - product weight 128g
Screws M2.5*5 - Qty 8
Requires soldering of the ESC wires to the ESC itself - be sure to use proper Amtech 223 flux Paste
Connect in accordance with this diagram below