The HODEL-NATCO LAGS0250300CZ are heavy-duty hex head lag screws designed for securely fastening heavy lumber, timber, and structural materials under high-stress loads. Manufactured from durable low carbon steel with a corrosion-resistant zinc plating, these screws can be used directly in wood or with lag shields for applications in concrete, brick, and mortar. Featuring a 1/4" diameter and 3" length with a gimlet point and coarse lag thread, they provide excellent holding power where standard wood screws are insufficient. This 100-piece pack is ideal for construction, deck building, framing, and other demanding woodworking and masonry projects.