Designed for woodworkers, metalworkers, and construction professionals, this gearbox assembly handles woodworking, metalworking, and building projects with ease. A lightweight design combines quality materials with smooth gear transitions to optimize efficiency across all working conditions. Suitable for home renovations, workshop setups, or heavy industrial applications that require precision and performance. Engineered for brushless 12V, 16.8V, and 21V lithium drills. This gearbox assembly delivers up to 40 Nm of torque with an advanced gear structure to provide superior performance on demanding tasks. Use scenarios - Upgrading a cordless drill to a high-torque, precise driver for woodworking and cabinetry installations, enabling controlled screw driving in hardwood. - Supporting light metal fabrication and assembly tasks that require steady torque and reliable performance on aluminum or similar components. - Handling home renovation and workshop setup tasks such as mounting fixtures, assembling storage solutions, and installing hardware with consistent results.