This industrial-grade fastener is perfect for creating the easiest possible installation in your home or commercial space on countersunk brackets, countertop supports, and more. The kit comes with silicone adhesive and 12 2.5" head lag screws to securely mount your bracket and keep your newly installed countertops, shelf, or work space safe. Kit includes 12 - 1/4" x 2.5" countersunk head lag screws and one tube RTV silicone for countersunk hole installation. Disclaimer: Number of brackets the kit is able to install is dependent on the number of holes your bracket has.