A tulip assembly for use in a pedicle screw system is described. The tulip assembly comprises a ring and a body. A distal end of the body comprises a first and a second reduction channel located on a first and a second side, respectively. A ramp down portion is located between the reduction channel and a securement portion. The securement portions are located distally from the reduction channels. When the tulip assembly is rotated to an open position, the reduction channels receive pins located on a distal end of the ring. Upon applying an axial downward force to a rod within the assembly and rotating the assembly to a closed position, the pins are received and secured by the securement portions. Threads located on an exterior of the body engage threads on an interior of the ring and serve as a locking mechanism to secure the rod in place.