Used to connect the Mosko Wedge Mount or Scout Pannier Plate to your pannier rack.  With two extra wedges and a Puck Sak, you can use one set of panniers on two bikes.  Puck Sak includes 8 blue anodized pucks, 8 black anodized stainless steel black washers, and 16 black anodized screws.  Check the Fitment Page for rack compatibility information.  Note: these are included with the pannier kits, so it is only necessary to order them separately if you want to setup a mounting system on a second bike.