The Holder set (OEM Part No. 3128314012) is a spare part compatible with Boomer M2D, Boomer T1D, Boomer XE3C, Boomer 291, Boomer 281, Simba S7D, Boomer L2D, boomer-282, BOOMER-M2C underground drilling rigs. Manufactured from durable alloy steel, it is a structural component for the tool holding & fixing system at the clamping holder assembly position. It firmly clamps and secures drilling tools and hydraulic pipelines to avoid loose displacement during high-vibration mining work. Its rigid alloy steel frame provides reliable clamping force, perfect OEM fit and long-term structural stability for drilling rig operations.