Mr. Pen- Nuts And Bolts Assortment Kit, 900 Pcs, Stainless, Bolts And Nuts Kit Mr. Pen nuts and bolts assortment kit includes 900 pieces, providing a comprehensive set for various assembly needs. Made of 304 stainless steel, these nuts, bolts, washers, and screws are durable, rust-resistant, and built for long-term use. The kit features a wide range of sizes, including #4-40, #6-32, #8-32, and #10-24, to suit diverse applications. Each piece is organized neatly in a durable, compartmentalized storage box for easy access and identification. Ideal for DIY projects, home repairs, and industrial use, this kit ensures you have the right hardware for every task.