The Holder (OEM Part No. 3128078548) is a heavy-duty structural component used in the drill steel support system of various underground and surface drilling rigs, including FlexiROC D65 LF, Boomer 281, Boomer L2 D, and SmartROC D65. Manufactured from high-strength alloy cast steel, this holder provides stable positioning and secure support for drill steel components during operation. It is engineered to withstand heavy loads, vibration, and continuous mechanical stress in demanding mining, tunneling, and surface drilling environments, ensuring structural reliability and long service life.