Top critical review
I recommend you take all the wires out of the packet
on 30 January 2016
Three of the ten received were defective/broke with very little stress on the cable.
I recommend you take all the wires out of the packet, screw each wire properly and apply some pressure; i.e., hold the loop from either side and pull from side to side. Remember, we're not applying Hulk strength here, just trying to weed out the poor quality wires.
This should save you from the embarrassment of a wire snapping and your keys falling to the floor like it did for me.