High Strength and Stability: High-quality zinc plated steel with excellent rust and corrosion resistance. Rugged and durable, it can work well with screw gun House and Building Essentials: They can pierce through drywall, wood, sheet metal easily. The assorted screws are ideal for your home, office, or industrial workplace Organized and Safe: All screws are placed in a storage case with dividers. So they are safe, don’t worry about them will be messy Screws Assortment Kit: There are 4 common head types and sizes for you, included Mod Truss, Flat Head, Hex Washer Head, Bugle Head screws from #4 x 5/8" to #8 x 1-1/2"(16mm to 38mm) Wide Usage: Suitable for both indoor and outdoor applications. Of course, this can also be used as a gift for friends with strong hands-on ability.