DIFFERENT SIZES - We offer the following 7 common sizes for your use: 30 x M3.5 * 16 mm, 30 x M3.5 * 20 mm, 35 x M3.5 * 25 mm, 35 x M3, 5 * 30 mm, 30 x M3.5 * 35 mm, 35 x M3.5 * 40 mm, 35 x M3.5 * 50 mm HIGH QUALITY MATERIALS - all self-tapping screws are made of 1022A carbon steel, with black oxide coating, even in humid environments they have strong rust and corrosion resistance, beautiful and practical MULTIFUNCTIONAL - The sharp self-tapping screw can ensure the plasterboard is attached to the studs, the thick thread design can effectively grasp the pile of wood, and the sharp pointy tip can help with the To pierce plasterboard to create a solid effect VERSATILE - self-tapping screw has a sharp point, self-tapping wood, furniture and mild steel. Typical uses are drywall / thin slate installation, wood furniture and closet repairs. These screws can can be used in many materials and are very suitable for home, office and shop use EASY TO CARRY - Screws is in a sturdy storage box to prevent loss and is easy to find when needed. Plasterboard screws are mainly used to install plasterboard in homes, buildings, and offices used Product features This self-tapping screw has a sharp point and can knock wood, furniture and mild steel. Typical uses are drywall / thin slate installation, wood furniture and closet repairs. These screws can come in many Materials are used and are very suitable for home, office and store use Specification: Material: black oxidized carbon steel Head type: horn head Color black The package includes: 30 x M3.5 * 16 mm 30 x M3.5 * 20 mm 35 x M3.5 * 25 mm 35 x M3.5 * 30 mm 30 x M3.5 * 35 mm 35 x M3.5 * 40 mm 35 x M3.5 * 50 mm