The Tri-Lock system of pre-cast concrete blocks consists of two components; a lock block and a key block, both of which are keyed into two other components for ground stability and integrity.

With an effective and environmentally sound method of combating severe erosion problems, Tri-Lock offers owners and users of inland and coastal waterways, drainage canals, highway revetments, river embankments, boat ramps and other problem areas a highly effective erosion control solution.

For easy installation, these pre-cast concrete blocks are typically installed in dry conditions by a specially engineered filter fabric from Adbri Masonry .