FITMENTS: 2002-2005 WRX2006-2007 WRX2008-2014 WRX2004-2007 STi2008-2014 STi2013+ BRZ & FR-S Brand: Company23Manufacturer’s Part Number: 521Manufacturer’s Warranty: Limited Lifetime WarrantyProduct not designed for use with an impact wrench Manufacturer’s Description:Limited Lifetime Warranty!Features:• 13mm square fits Subaru rear differential drain/fill ports perfectly.• Will not strip stuck drain sockets like using a 1/2″ extension.• Hardened chrome tool steel is built to last• 1/2″ drive for maximum torque