Features and Benefits: Includes 8 popular sizes, ranging from #8 x 3/4" to to #10 x 1"; Contains product assortment map for easy identification of components; Packaged in multicompartment, refillable plastic case; Manufactured from durable steel and then zinc plated to resist corrosion; Variety of lengths included; These K Tool International 200-piece hex head washer drill kits include #8 and #10 self-tapping screws. They are manufactured from durable steel and then zinc plated to resist corrosion. With the variety of lengths included in the K Tool International 200-piece hex head washer drill kits, you're sure to find the right ones for your special project.