Luthier supplies consist of tools, maintenance products, and strings. Tools include hex wrenches for neck adjustments, small spanners for bridges, and pliers for string changes, all designed for guitar repairs. The right tools enhance efficiency and reduce repair time. Maintenance products like guitar cloths and care oils clean surfaces, moisturize wood, and prevent drying, thus prolonging the guitar's life and tone. Avoid corrosion and scratches during use. Strings, made from steel or nylon, come in various specifications for different playing styles. Regular string replacement ensures optimal tone and performance, with tension and material quality being crucial. Choose tools based on personal needs.