Sintering is used to make a great number of mechanical and hydraulic structural components. The main market for sintered components is the automotive industry, which uses powder metallurgy to make an extremely diverse range of structural parts for engines, transmissions, clutches, transfer cases,exhaust, EGR, starters, brakes, steering columns and racks, shock absorbers, comfort and safety systems (rear-view mirrors, sunroofs, HVAC, etc.) and pumps (oil, fuel, water, power steering, servobrake, selective catalytic reduction [SCR], variable valve timing [VVT], continuously variable transmission [CVT], etc.). Other typical markets of sintered components are handtools, household appliances, industrial pumps, home fittings, industrial machinery and weapons.