The Bitspower 14mm Bending Kit is designed for shaping hard tubing, typically including tools like silicone inserts and tube benders for making precise bends. The Bending Retouch Kit, on the other hand, is used for refining or correcting bends—helping to smooth out or slightly adjust existing curves without damaging the tube. Essentially, the main kit is for initial bending, while the retouch kit is for fine-tuning.