OEM‑compatible Pulley Wheel (3128078534) for Boomer M2D, Boomer XE3C, Simba S7D, Boomer L2D, Boomer M2C, ROC‑D7, and ROC‑D9 underground drilling equipment. Made from hardened steel, this aftermarket spare part is part of the rotation head assembly, ensuring smooth and reliable rotation and power transmission in hydraulic breaker and rock drill systems.