Product description: Heat treated alloy steel for strength Also works on the Chevrolet Optra in markets outside the US Easily adjust and hold the water pump when replacing or adjusting the timing belt The stubby tool design allows access to timing belt sprocket without interference from vehicle frame Specification: Size: 41MM It works on 1.6L engines in 2004-current Chevrolet Aveo excluding 2009 with variable timing engine and 1999-2002 Daewoo Lanos. Package include: 1x 41mm Water Pump Wrench