The STARRETT USED V-BLOCK No. 567 Toolmakers V Block is a high-quality machinist inspection tool made in the United States. This V-block, made from hardened steel, is designed for precision milling and grinding tasks. With the Starrett brand known for its durability and reliability, this V-block is a valuable addition to any workshop or manufacturing facility. Its V shape allows for stable and secure clamping of workpieces, making it essential for accurate machining and inspection procedures. Got this from my dad's estate. other Starrett tools listed take a look.