24-count Meet code and lower installed costs! FastenMaster’s ThruLOK Screw Bolt Fastening System replaces 1/2 inch carriage or through-bolts without predrilling. ThruLOK installs quickly with an 18 volt cordless drill and doesn’t require special bits or wrenches. The three part kit assembly includes a ThruLOK fastener featuring the patent pending Paddle Point, engineered washer, and LOK-Nut. No need to count out bolts, nuts, and washers. The product’s galvanized coating meets current IRC ACQ corrosion requirements and is guaranteed for the life of the project. ThruLOK is also a code compliant replacement for 1/2 inch carriage or through-bolts. This fastener comes in specific lengths to tackle primary deck applications. Installation instructions and code documentation are included in each box. ThruLOK products are manufactured in specific lengths to tackle primary deck applications. The 6-1/4 inch fastener is used for single 2x to 4x decking posts.