Applications: most Toyota models fitted with 1800cc and 2000cc engines, including Prius, Corolla and Avensis Size: 645mm x 14 flutes x 1/2"D with 21mm Hex To be used with either a 1/2"D ratchet or a 21mm spanner Manufactured from aluminium, which reduces the chance of damage to the housing whilst still allowing it to withstand the additional torque required in loosening filters if stubborn or previously overtightened