RSI Spring is capable of designing and manufacturing almost any type of torsion spring. Torsion springs have ends which are rotated in angular deflection. Special types of torsion springs include double torsion springs and springs that have a space between the coils to minimize friction. Double torsion springs consist of one right-hand wound and one left-hand wound coil section connected together, and working in parallel. Whatever the need, Peninsula Spring can meet it.