Square adaptors are available in two sizes for use with either 25mm or 32mm tool holders. The adaptors provide a method for allowing the Tooling System to be used on traditional machines such as slotting and shaping machines. Manufactured from 39NiCrMo3 steel, heat treated and then blued, the adaptor provides two holes 12 MA threaded for use with two flat head M12 x 8 screws to secure the tool holder in place. The square adaptor offers a locating slot on each of the four sides.