Product review (1 stars): DON'T BUY THIS - buy the NEW, upgraded part W10712394.......
This part is a piece of junk and they should stop selling it. Buy the complete upgrade kit from Whirlpool/Kitchenaid.&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Whirlpool-W10712394-Adjuster-KIT/dp/B00SPYDSFC/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Whirlpool W10712394 Adjuster KIT</a>&nbsp;It replaces both sides.  It is MUCH MUCH better quality.  Stainless Steel frame instead of plastic.  The wheels appear to be installed in a much better fashion.  The kit comes instructions, it calls for a torx screwdriver for 4 screws and a small screw driver for releasing some tabs on the old assembly.  Note, if you don't haven torx drivers, the kit (at least mine did) came with an adapter so you can use a phillips screwdriver.  Very easy installation.  Removing the old parts is the hard part. Not that the new kit replaces everything: the complete rack adjuster assembly, not just the plastic piece that the wheels roll on.