Hillman 230071 Zinc Hex Lag Screw, Silver Designed to attach objects to wood and anchor masonry Zinc finish provides fair corrosion and rust protection Coarse threads requiring a pre-drilled hole with minimal clearance above the fastener Hex drive for controlled traction with a socket or wrench Features Designed to attach objects to wood and anchor masonry Zinc finish provides fair corrosion and rust protection Coarse threads requiring a pre-drilled hole with minimal clearance above the fastener Hex drive for controlled traction with a socket or wrench USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.