PERFORMANCE YOU CAN TRUST
The FinLok is the stainless plate that keeps the fins locked into the LOKBOX. The finlok is designed to bend upon serious impact to your fins while surfing - in most cases ejecting the fin and sparing damage to the LOKBOX. The bent finlok can be removed from the screw, flattened out, and re-installed with a new fin. The finlok should always be screwed down tight!