Copper Ferrules provide the perfect way to secure steel wires or rope in place with a tight compression fit. This ensures that the rope remains resilient when handling payloads of various sizes.
 
For many above-ground applications aluminium alloy ferrules will suffice.
Copper or stainless is available as an alternative where aluminium alloys are not permitted due to spark hazards or corrosion.
 
The size of the ferrule you choose should be relative to the rope/wire diameter. So, If using 4mm wire/rope, please choose a 4mm ferrule.