OEM‑compatible Ring (3128061600) for Simba M4C, Simba E7C, Simba M40S, Simba H1354, and Simba H1254 underground drilling equipment. Made from hardened steel, this aftermarket spare part is part of the rotation head assembly, ensuring durable and reliable operation in mining and tunneling applications. Its robust construction extends service life and enhances performance in demanding underground environments.