1.Optimally Adapt: Suitable for An Opening of 8-9Mm, The Plug Is Universal for Solid Brick, Perforated Brick, Hollow Block, Plasterboard, Fiberboard And Can Also Be Simple.The Screws Provided Are Perfectly Suitable Ankle. 2. Quality Assurance: Plastic Anchors Are Very Durable And Difficult to Break. High Quality Stainless Steel Screws. Out And offers Good Corrosion Resistance In Poor Environments Such As High Temperatures, Cold Weather And High Humidity Areas. 3. Absolutely Powerful: The Spaces In The Ribbed Anchors Widen By Two Opposite Sides As You Tighten The Screw, Increased Holding force, The Anti-Rotation Lock Prevents The Ankle from Rotating And Thanks to The Best Possible Feedback You Can Immediately Feel When He Is Perfectly Seated. 4. Areas of Application: The Powerful Plug Is Suitable for Fixing Light Wall Shelves And Mirror Cabinets, Curtain Rods, Hanging Baskets, Electrical Installations And Wall Clocks In Many Building Materials Such As Solid Bricks And Perforations, Natural Stone, Solid Brick And Perforated Lime Sand, Plasterboard, Hollow Ceilings. 5. Specifications 50 Plastic Anchors and 50Pcs of Screws (100Pcs In total) Plastic 12 X 30 Mm Screws 8X 50 Mm.