The Jaw (OEM Part No. 3128240300) is a precision wear part compatible with Epiroc rock drills including F9-11, S7D, ROC-D7-11, ROC-D9, and S7D-1 models. Constructed from hardened alloy steel, it is designed for use within the drill steel clamping system, occupying the clamping or gripping position. The jaw ensures secure rod holding, consistent torque transfer, and reliable engagement during drilling operations. Its robust, wear-resistant design provides long-lasting durability, maintaining operational stability and mechanical alignment under high-load and repetitive use conditions in underground rock drilling and bolting applications.