Description:The surface hardness of the screw is 500-550HRC and the toughness is strong, which is fine workmanship and durable to use.The screw is wear-resistant and head of the screw is sharp, so it can easily drill into wood and plastic.Made of high quality carbon steel material, the screw is anti-rust and sturdy.The length of the product is about 27.7cm, the width is about 22.5cm, and the height is about 4.8cm.It is suitable for home improvement, woodworking drilling, etc.Item Name: ScrewsMaterial: Carbon SteelSize Details: 27.7cm x 22.5cm x 4.8cm/10.91" x 8.86" x 1.89" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:552Pcs Square Slot Screws Set: 150 x 25mm Screws150 x 32mm Screws 150 x 38mm Screws50 x 50mm Screws 50 x 63mm Screws 1 x SQ2 Batch Head1 x Plastic Boxor552Pcs Phillips Screws Set: 150 x 25mm Screws150 x 32mm Screws 150 x 38mm Screws50 x 50mm Screws 50 x 63mm Screws 1 x PH2 Batch Head1 x Plastic Box