OEM Contractor (>3.5–≤5.0 t). Variable piston pumps are typical at this class, supporting higher system pressures and flow rates needed for heavy-duty work cycles. Pilot controls are the norm and may be electronically assisted. Fully enclosed cabs are standard with climate control increasingly common. Swing booms and variable angle booms are frequently available. Zero-swing configurations are common alongside standard tail swing. OEM-grade Chinese minis with stronger structures, advanced cooling/filtration, and higher hydraulic capacity. Premium/export-grade diesels are typical. Used by commercial contractors, municipal fleets, and infrastructure crews. Maintenance is more professional with emphasis on hydraulic system service, advanced filtration, and electronic diagnostics.