The term 'Tannery Tools' refers to the tools used in the tanning process, which is the process of treating animal hides to make leather. The four-letter solution for this term is 'Awls, ' which are tools used to puncture and shape leather. Awls are typically made of metal and have a sharp point at one end and a handle at the other. They are used to make holes in leather for stitching, as well as to shape and trim the material.