A high-performance gearbox assembly for 12 V, 16.8 V and 21 V brushless lithium drills that delivers up to 40 Nm of torque with an advanced gear structure for consistent performance under demanding conditions. Key benefits Reliable power and control: Up to 40 Nm torque gives the force needed for tough fastening, drilling and light demolition without sacrificing control. Broad compatibility: Designed specifically for 12 V, 16.8 V and 21 V brushless lithium drills, making it suitable for a range of cordless tool platforms. Versatile operation: Built-in impact, drilling and screw-driving modes let you switch quickly between tasks for improved productivity. Long service life: Heat-resistant materials and a smooth gear transition reduce wear and overheating, extending gearbox lifespan. Lightweight, efficient design: Low weight plus optimized gear geometry improves handling and maintains efficiency across different working conditions. Technical highlights Voltage compatibility: 12 V, 16.8 V, 21 V — for brushless lithium-powered drills. Maximum torque: Up to 40 Nm for demanding applications while maintaining precision. Gear system: Advanced gear structure engineered for smooth engagement and durable performance. Operating modes: Impact mode, drilling mode, screw-driving mode for multi-task use. Materials: Heat-resistant components to minimize thermal degradation under load. Design focus: Lightweight assembly to reduce operator fatigue and improve tool balance. Practical use scenarios Home renovation: Drive long screws into timber, fit hinges and fixtures, or drill holes for shelving with consistent torque and mode control. Workshop and DIY projects: Reliable performance for assembly, cabinetmaking and repetitive fastening where durability matters. High-performance tasks: Repairs and maintenance requiring controlled impact force or sustained torque—e.g., metal-to-metal fastening and through-hole drilling. Why you need it Replaces or upgrades worn gearboxes to restore original tool performance. Provides a durable, versatile drivetrain that adapts to multiple tasks and voltages. Reduces downtime and tool overheating with heat-resistant materials and smooth gear transitions. Compatibility and performance are maintained as specified: intended for 12 V, 16.8 V and 21 V brushless lithium drills, delivering up to 40 Nm, with impact, drilling and screw-driving modes, a lightweight layout and heat-resistant construction for reliable, efficient operation.