Save time, money and labor costs TimberLok sharp point and aggressive threads penetrate the densest woods without pre-drilling and provide stronger shear values than 3/8 inch galvanized lag screws. TimberLok unique countersinking head design is perfect for your next wood-to-wood project whether it be deck framing, fencing or any post to beam connections. It's also perfect for replacing galvanized spikes in raised flower beds, landscaping or retaining walls. No need to predrill and sledge a spike. TimberLok just zips right in.