The W074144 twelve point socket manufactured by Workpro is 3/8” and made of Chrom-Vanadium steel. This socket is designed for use with a 3/8” wrench and is 20mm in size. It is constructed of hardened steel, making it a durable choice for home projects and DIY repairs. This wrench socket is ideal for quick repairs and fastening hardware with tight or hard to reach spaces.