●【Suitable for small DIY projects】 These small screws and nuts are especially suitable for 3D printing DIY and RC car enthusiasts. ●【Not oily and rust proof】 These black zink plated finish screws are not oily, they will not dirty your hands or DIY items, and the rust proof performance is better than other oiled screws. ●【Good Storage and assortment】All These Screws are Packed In a Sturdy Easy-use Plastic Storage Box, Organized Conveniently and Easily. ●【Easy to operate and strong】 Hex socket head cap screws can be screwed into the nut directly by hand without a wrench, Grade 12.9 alloy steel screws are ultra-high strength and not easy to break. ●【GUARANTEED】Try our Kadrick Hardware Assortment Kit with NO risk and 100% money-back guarantee - NO questions asked!