As standard the FREE Leash is delivered with a Dyneema-Loop as harness attachment. This fits through all common harness rings.
The carabiner is encased by the neoprene cover as standard, so that it is difficult for a leash to get caught in it.
A medium-hard spring is built into the trigger. Hard enough to avoid accidental release, but also soft enough to separate easily from the kite at any time.