This set of (2) 2007-2008-2009-2010-2011-2013 "Factory Style" Top Half Chrome Mirror Covers are made of STRONG, DURABLE, TRIPLE CHROME PLATED, light weight ABS construction (Matches the Factory Chrome PERFECTLY!!!). These Factory Style "Top Half Chrome Mirror Covers" are for the Top half of the mirror, just like the GM factory Style chrome mirror covers (Except for only a fraction of the PRICE!!). The Chrome "Factory-Style" mirror covers attach to the factory mirrors with 3M double-sided automotive adhesive which is already attached to the inside of the parts. Just clean the mirror surface with an alcohol based cleaner and stick the covers on. The 3M adhesive is an automotive grade adhesive and is VERY, VERY STRONG. Your new GM "Factory-Style" Top Half Chrome Mirror Covers will fit the top half of your existing vehicle's mirrors "PERFECTLY" and installs in LESS than five minutes "WITH NO TOOLS"!!!!