About this item SUPERIOR SCREW: Composed of high strength 1022A carbon steel. The heat-treated thread is very clear and the sharp tip can penetrate wood quickly. Finished in rustproof black phosphate coating, can withstand prolonged salt spray testing. VARIOUS SIZES: A kit of drywall screws in 6 commonly used sizes( #8 x 3 in, #6 x 2 in, #6 x 1-1/2 in, #6 x 1-1/4 in, #6 x 1 in, #6 x 3/4 in ), a total of 166 for diverse projects. WIDE USE: The screw set can be used for plank, gypsum board, composite board, soft metal, plastic. Easy to install with screwdriver or electric drill. CONVENIENT CASE: Place in different grids according to the size, which is efficient to find the desired size. Polypropylene box of excellent material can be reused as a storage box. WARM PROMPT: It is recommend for best result to drill holes in advance. And ensure secure holding, not easy to slide when using. › See more product details