These high quality magnetic catches are: Concealed from view Constructed to provide a flush fit to any door of frame Able to hold in-frame doors securely and quietly The catches can be mounted within the woodwork so they are just visible, or mounted sub-flush so they can be totally invisible after filling and finishing With any magnets the greater the gap between them the weaker the attractive force will become - e.g. with a 2 mm gap between the magnets there is a 2 kg pull For best results we recommend all flush magnets are bonded into their fixing hole with a suitable contact adhesive Colour/finish Nickel Material Neodymium For wood thickness 19.00 mm Installation For push fixing Supplied with 1x North magnet 1x South magnet Fixings Additional information attributes The spike is there for alignment only, not for screw fixing. Drill a pilot hole deep enough for the magnet and spike, glue fix and press the magnet in