Your BOWdometer comes with a Universal Mounting System that includes an injection-molded mount and 2 self-fastening straps to work on any bow.
The mount is designed to also use threaded mounting bolts for a rigid attachment to your bow's riser. Not all risers are made with threaded access holes that meet this spec. You can also find these bolts at some archery and general hardware shops.
This is a 5/16" - 24 threaded bolt, 1/2" in length.
Please make sure this bolt will work with your bow's riser before purchasing.