The Hillman Group 47877 5/16-Inch x 4 Star Drive Construction Lag Screw with Truss Head 1000 Hour Bronze Ceramic Coat， 100-Pack<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>No pre-drilling</li><li>Star drive helps eliminate campout</li><li>Ideal for decks， stairs， play sets and many other outdoor projects</li></ul></div><img src="http://ecx.images-amazon.com/images/I/414Oz00LgFL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31k%2BP4tR%2BOL.jpg" noproxy>