Make of steel, concrete screws are enduring and resistant to damage Its special surfaces ensures high strength, hardness, resistance, and rust resistance for long lasting durability The high thread allows for easy and quick penetration into masonry and others, while the low thread provides excellent retention and allows for removable fastening Suitable for most masonry substrates, such as concrete, bricks, blocks, cement, plaster, mortar, and wood, making it ideal for construction, installation, and daily maintenance The masonry screws design provides a strong grip, and the tapered tip allows for faster drilling, better penetration through materials like concrete slabs, and excellent stability, Manufacturer: Kaeltsyn