►【Advanced material】: These screws are made from a high quality black steel.The screws are treated so they resist rust and corrosion.They are high strength and will not deform or break under normal use.The aggressive screw twist pattern allows you to drive them fast and to complete your project efficiently and quickly. | ►【Multifunctional】：with sharp points for self tapping into wood, furniture and mild steel.Typical uses are for installing dry wall /sheetrock, repairing wood furniture and cabinets. These screws can be used on a wide variety of materials and are ideal for home, office, and shop use. | ►【Various Sizes】：We provide you with these 8 common sizes for your use. We list in US sizes and Metric for your convenience. 3/4'' or 20mm 1'' or 25mm 1 1/4" or 30mm 1 3/8'' or 35mm 1 5/8'' or 40mm 2'' or 50mm 2 1/2'' or 60mm 3'' or 70mm These screws are environmentally friendly, mercury free, and non toxic so they can be used with confidence. | ►【Convenient To Carry】：The screws are packed in a handy and durable storage container that has separate compartments for each size screw making it easy to keep track of your screw sizes and for easy transport and storage. | ►【Excellent customer service before, during, and after the sale.】：If by unlikely chance you incur a problem with our product, please get in touch with us so we can resolve the issue you are having as quickly as possible so you may continue your project.