current design may be manufactured entirely from polymer or from a combination of steel and plastic the entire flapper unit 20 may be molded from plastic and snapped into place to reduce assembly labor the advantages of the polymer include its resistance to corrosion polymers tend to resist saltwater and are practical for applications near saltwater or at locations where atmospheric pressure would cause corrosion of standard ferrous metals the lubricity of polymers also reduces the need for additional lubrication the latch is easily adaptable to retrofit with a standard deadbolt the deadbolt is mounted in the side of the lock body with the striker locked between the flappers a key would is inserted into the deadbolt and turned thereby causing the bar in the deadbolt to move down between the flappers and restricting the flapper movement and locking the assembly a locking gatelock is approximately one inch longer than a latch without a key lock the current design is adaptable to employ a standard pad lock for the purpose of locking the gate shut a hole is be drilled in either of the flappers so that the pad lock may be locked through this hole the size of the lock prevents the flappers from swinging in thus locking the striker bar inside the latch holes may be drilled in both flappers to permit locking from either or both directions in this embodiment the latch mechanism is incoporated in a full length post the post is set so that the mechanism is oriented with the slot adjacent to the gate the striker bar is mounted on the gate at the proper height after the post installation in this embodiment a large wooden fence post typically 5 inches.