The Schley/SP Tools BMW N54 N55 T-60 Torx Serpentine Belt Tensioner Tool, No. 12500, allows technicians to access most T-60 Torx belt tensioners on BMW N54 and N55 engines found in many models from 2007 to 2013. The 12500 is double-ended to fit more models and is extra long for better leverage. This wrench design allows technicians to loosen the spring pressure with minimal force and still maintain access to the lock pin hole. This tool is designed to cut labor time by reducing the number of parts needed to be removed in order to gain clearance for the tensioner.