The Klein Tools 32516HD KNECT 16-In-1 Impact-Rated Hybrid Screwdriver/Nut Driver is a versatile tool designed for home improvement projects. This screwdriver features a square shaft and a 3/8 inch head size, making it suitable for a variety of tasks. Made of stainless steel, this durable and high-quality tool from Klein Tools is a reliable addition to any toolbox, offering both strength and precision for efficient and effective work.