Features: 1. Application: Compatible with BMW N20 N26 1.6L 2.0L petrol engines. Fits for BMW 1 Series 2012-2016; Fits for BMW 2 series 2014-2016; Fits for BMW 3 series 2012-2016; Fits for BMW 4 series 2014-2016; Fits for BMW X1 2011-2015; Fits for BMW X3 2011-2017; Fits for BMW X4 2014 -2017; Fits for BMW Z4 2011-2017. 2. Function: Used for aligning the balancer shaft into the correct timed position and holding chain sprocket for removing and installing/replacing the oil pump or chain or balance shaft housing during chain repairs. 3. Benefits: This tool set helps to release & tighten down the central bolts on the vibration damper hub when you replace the timing chain. .