D&D LokkLatch Magnetic Latch, Keyed Alike w/Black Trim Finish-LLMKABT Patented magnetic self-latching - Gate Gap .375" to 1.25" (Ideal gap is .75") Fits posts and gate frames 2" to 6" - the post and gate frame must be square to work For Vinyl, Wood, and Metal Gates - the gate frame must be square and at least 3" x 3" - Opens and Locks for either side of fence - all fasteners included Adjustable vertically & horizontally - look at the pictures - this item is large, almost 9", make sure you have enough clearance on each side. Call - 800-716-0888 for technical support or installation help - super tough polymer construction