This Wood Screws Phillips Flat Head Assortment Kit from T.K.Excellent contains 590 pieces of screws suitable for drywall and wood projects. The screws are made of steel with a yellow zinc finish, providing durability and corrosion resistance. The kit includes screws in various lengths ranging from 16mm to 70mm, with thread diameters of 3mm to 5mm, making it versatile for different applications. These screws feature a flat head design and a Phillips drive type for easy installation and secure fastening. Perfect for professionals and DIY enthusiasts alike, this assortment kit offers a convenient and comprehensive solution for various fastening needs.