Used for rotating the water pump to enable the driving belt to be tensioned. Special tool designed to prevent damage to the Visco clutch. Use with 1/2” wrench. Applicable: Opel / Vauxhall / GM OHC – engines 1.2, 1.3, 1.4, 1.6 L. ITEMSizeApplicable448439mmOpel / Vauxhall / GM448541mmOpel / Vauxhall / GM448646mmOpel / Vauxhall / GM Please also check our ebay store:http://stores.ebay.com/topautotoolsClick here to visit our ebay store! We Accept PayPal .