a) a vinyl fence with vinyl fence sections and vinyl fence posts, each fence post being a hollow post having four outer post walls surrounding a post interior, each post wall having an outer surface, an inner surface and wherein two of said post walls are opposing walls having an aperture;

b) a gate mounted on the fence in between two of said fence posts;

c) a locking mechanism that enables the gate to be locked;

d) wherein the locking mechanism includes a dead bolt lock and a pair of cups, each cup mounted in an aperture of a post wall, each aperture having a cup;

e) each cup having an annular flange that abuts an outer surface of a post wall, wherein the cups are positioned at about the same elevation and on opposing, generally parallel post walls of a post;

f) each cup having an annular side wall forming a concavity extending into a post interior, said annular side wall connected to said annular flange;

g) the concavity of each cup having a front opening surrounded by said annular flange;

h) wherein said cups are connected with said dead bolt lock, said dead bolt lock connecting to each of said cups at positions within the post interior and spaced inwardly of the post walls; and

i) said lock providing a throw that is movable between locked and unlocked positions.