Tools are essential in 3D printing for assembly, maintenance, troubleshooting, and achieving high-quality prints. Basic tools like hex wrenches help with setup, while nozzle wrenches and brushes assist in maintenance and repairs. Filament cutters (Flush cutters) prevent printing issues, while spatulas/scraper and adhesion aids ensure smooth print removal. Post-processing tools like sandpaper or files, knives, and heat guns refine prints. Without these tools, maintaining a printer and producing high-quality prints would be much more challenging. 

Printing accessories are important because they improve the overall performance, efficiency, and quality of 3D prints. Accessories like bed adhesion aids ensure prints stick to the bed properly, reducing the chances of warping or failed prints. Nozzle upgrades and extruder improvements help achieve more consistent extrusion, especially with different filament types, while cooling fans and ducts ensure better print quality by cooling layers quickly and reducing issues like stringing or poor layer adhesion. Monitoring accessories like webcams and smart power switches allow for remote control and observation of prints, offering convenience and reducing the risk of errors. Overall, accessories enhance the reliability and ease of 3D printing, making the process more efficient and yielding higher-quality results.