Engineered for 12v, 16.8v, and 21v brushless lithium drills, this gear box assembly delivers up to 40nm torques with advanced gear structure for superior in demanding tasks Featuring impacts, drilling, and screw driving modes, the gear box ensures long lasting reliability Perfect for home renovations, workshop setups, or heavy duty industrial applications requiring precisions and power Ideal for enthusiasts and professionals, it handles woodworking, metalworking, and construction projects with ease Its lightweight design combines materials and smooth gear transitioning, optimizing efficiency across working conditions