【Product Specifications】105 PCS concrete screws kit, including three common sizes: 3/16 x 1-1/4 , 3/16 x 1-3/4 , and 3/16 x 2-1/4 , and it comes with drill bits, drive heads and storage box 【Product Details】The kit includes: 10 pieces of plain-head concrete screws in blue, black and white (3/16 x 1-1/4 ); 15 pieces of each in blue, black and white (3/16 x 1-3/4 ); 10 pieces of each in blue, black and white (3/16 x 2-1/4 ) 【High-quality Materials】Concrete screws are made of high-strength carbon steel and undergo heat treatment processes, making them sturdy and durable. The phosphate coating offers reliable anti-corrosion properties and is suitable for various indoor and outdoor environments 【Broad Compatibility】 Concrete anchors are suitable for fixing brackets, devices and hardware accessories on concrete, brick and mortar walls. They can perform perfectly well in both professional construction sites and home renovation projects. (3/16-inch screws require a 5/32-inch impact drill bit to pre-drill the hole.) 【Special Design】The flat-head structure ensures that the masonry screws will be flush with the surface after installation, which helps maintain a neat and attractive appearance, enhances the grip force and hand-holding strength. The unique thread design can deeply embed into the brick and stone, providing a more stable grip than ordinary screws. This special surface treatment also reduces friction during the installation process, making the screw insertion smoother 【Multi-functional Fastening Solution】Compatible with impact drills, impact drivers or standard electric drills. Suitable for fixing shelves, brackets, cable conduits and outdoor lamps to solid brick and stone walls ASIN B0FH65PM9X Brand Cranviech Color Black, Blue, White Model Concrete Screw Anchor Kit Set Name Concrete Screws Kit 105PCS Head Type Flat Size Name 3/16 x1-1/4 , 3/16 x1-3/4 , 3/16 x2-1/4 Metal Type Carbon Steel Unit Count 105 Count Item Weight 0.49 kg Part Number Flat Head Thread Size 3/16” Thread Type Unc Drive System Flat Finish Types Phosphate Manufacturer Cranviech Thread Style Right Hand Fastener Size 3/16 Fastener Type Concrete Screws Item Diameter 0.19 inches Material Type Carbon Steel Exterior Finish Carbon Steel Item Dimensions 0.37 x 0.37 x 1.25 inches Number Of Items 105 Thread Coverage Concrete Screw Anchor Kit Number of Pieces 105 Outside Diameter 0.19 inches Screw Head Style Flat Screw Point Style Sharp