Undermount sink installation in stone countertops requires specialized fastening hardware to secure the sink tightly to the underside of the stone without cracking the countertop or allowing the sink to sag over time. Proper sink clip and bracket installation is one of the most important details in stone countertop work — an improperly secured undermount sink is a service call waiting to happen. 

The sink clips and brackets in this collection include stone-specific undermount sink clips that attach to the stone edge without drilling, adjustable brackets for different sink rim thicknesses, and installation hardware for both stainless steel and porcelain or composite sink materials. All designed for professional countertop installer use. 

For the full countertop installation toolkit see Countertop Installation Supplies. For adhesive to supplement mechanical fastening see Interior Stone Adhesives.