The larger 5/16 inch shank size indicates it's likely for heavier-duty applications compared to the standard 1/4 inch hex shank bits
as you know the listed price covers both the left and right rotors for one axle (front or rear)
Improved Fuel Economy: Helps reduce fuel consumption
The jacket boasts a large white front zipper with a Porsche-branded pull
928 (1986-1994)
Mercedes-Benz Axle Joint | 2007-2017 Manufacturer:Genuine Mercedes The larger 5/16 inch shankAxle Joint for E400 (2015 2017), S550 (2007 2013), C300 (2008 2014), CL550 (2009 2014), GLK350 (2010 2015), E350 (2010 2016), E550 (2010 2014), S350 (2012 2013), GLK250 (2013 2015), E250 (2014 2016), E63 AMG (2014 2015), E63 AMG S (2014 2016)