Hypoid gears are a type of gear used to transmit power between shafts that are not parallel but intersect at an angle. They have a unique design where the pitch surfaces of the gears are offset, allowing for smoother operation and higher load capacity compared to traditional bevel gears. This offset design also enables the gears to mesh more quietly, making them ideal for applications where noise reduction is important. These gears are commonly found in automotive differentials and industrial machinery, where they help in changing the direction of power transmission. Their ability to handle high torque and provide efficient power transfer makes them a popular choice in various engineering applications.