Suitable for 2mm to 10mm thick glass. 5mm hole base to Wall, Wood, Deck, etc. Flat plastic washers for protecting glass. Easy to install with 9.65mm mounting hole on the glass. They are used to create innovative designs by combining glass to connect panels, display merchandise to mount signage or artwork to a wall, or to build unique displays. Used widely in glass door, glass cabinet, shower door, stairs handrails, glass railing, glass display or panel, countertop, etc.