18 Gauge 1-3/4" L shaped hardwood flooring cleats for 1/2" to 3/4" (12mm - 19mm) tongue and groove flooring; 500 per box. Specifically designed for blind nailing the last rows with the EDGE nailer Cleats feature a sharp set of barbs on each side to provide just the right amount of holding power Collated tape holds nails together and eliminate waste due to break-up Sturdy steel will not bend, even after multiple hits Cleat nails minimize wood splitting and still allow for expansion and contraction Compatible with Primatech Q900