Lean tools are a set of principles, techniques, and methods used in Lean manufacturing and Lean management to identify and eliminate waste, improve efficiency, and optimize processes. These tools are designed to help organizations streamline their operations and deliver more value to customers while reducing costs. Some common Lean tools include 5S, value stream mapping, Kanban, Poka-Yoke (error-proofing), and Kaizen (continuous improvement), among others. These tools are applied in various industries to enhance productivity, quality, and overall performance.