HAFD Heavy-Duty Sleeper Screws 12×300 mm Zinc-plated hex lag bolts for timber, sleepers & concrete. ✅ Strong 12 mm core for secure fixing ✅ Rust-resistant zinc coating ✅ Perfect for decking, landscaping & retaining walls ✅ 19 mm hex head – easy to drive with socket or impact Built for maximum strength, durability & outdoor use.
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