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40-Ton Excavator Long Reach Boom & Arm – 22m Reach for Dredging, Slope Work & Deep Digging 40-ton machine + 22meter extended boom is primarily used for river dredging, slope grading, and deep pit excavation. The standard model is sufficient for most dredging and slope maintenance tasks; however, if the material consists of hard soil or requires frequent loading of gravel, we recommend the reinforced model. This version features enhanced structural strength and slightly reduced bucket capacity—do not attempt to load the same volume as the standard model. The table and cabinet are standard configurations. For your specific machine, please send us the model number so we can verify the mounting hole dimensions.