1. C1022A material, high hardness, durable, not easy to damage 2. Surface treatment: galvanized, anti-aging, anti-rust, anti-corrosion 3. Countersunk head plum blossom groove design, hard tightening is not easy to damage the screw head, when the screw is driven in, the screw hole can be leveled, making the surface smooth and beautiful, with high practicability 4. The neck thread design can increase the attack speed, so that the speed of wood joining can be improved, and the operation is labor-saving and more efficient 5. Specially for hardwood, suitable for splicing of large wood-plastic craft products such as outdoor gardens, woodworking fences, docks, balconies, courtyards, etc. 6. Product weight (100pcs): 5 x 80mm is about 625g; 4.5 x 60mm is about 370g; 4.5 x 45mm is about 295g; 4.5 x 35mm is about 240g
