Kitchen sinks were traditionally ‘drop-in style, that is, with the rim of the sink sitting on the work surface. Teka drop-in sinks can be mounted on virtually any worktop using Teka clip-and-bolt fasteners.  Inset (Drop In) Kitchen sinks were traditionally ‘drop-in style, that is, with the rim of the sink sitting on the work surface. Teka drop-in sinks can be mounted on virtually any worktop using Teka clip-and-bolt fasteners, which adjust to the thickness of the surface for a tight, non-slip fit. The sink is fastened to the worktop from underneath, with no screws or bolts show. The drop-in design has a small rim to stop water spilling onto the work surface.