Adjustable Spigot (Base Mount)An adjustable glass spigot (base mount) is a key hardware component used in frameless glass pool fencing systems. It anchors tempered glass panels securely to a surface (typically concrete or decking) while allowing fine adjustments for alignment. What It Is A base mounted adjustable spigot: Is surface mounted (top mount) onto a slab or deck Holds glass panels using a friction fit system (no holes in glass) Includes adjustment screws or tilt