Description: 10 self drilling anchor screws, expansion screw sets, gypsum board anchor kit Feature: Expansion and retention: When the self drilling anchor screw is screwed in, the screw will expand, increasing its retention force. There are serrations on both sides, making the metal anchor easy to install. High quality self drilling anchor screws are made of carbon steel and have been galvanized, making our dry wall anchors durable in use. Wide compatibility: Self drilling anchor screws are best used for 1/4 inch, 3/8 inch, 1/2 inch, or 5/8 inch gypsum wall panels, gypsum boards, wall panels, stone boards, and gypsum boards. Easy to use: More importantly, they can be easily removed for reuse without leaving large holes on the wall. No drilling or drilling is required. Easy to install, saving you time and effort. Unique serrated design for enhanced retention products Type: Dry wall anchor bolt Material: carbon steel, galvanized Color: As shown in the picture Attention: Due to manual measurement, please allow for a slight error. Please make sure you don't mind before bidding. 2. Colors may vary depending on the monitor, please understand. Hello, please pay attention to your shipping address when purchasing products. If your delivery information (such as name, street, house number, doorbell/email without name, etc.) is incorrect, the order will not be delivered correctly Package includes: 10 * dry wall self drilling