The Wolf Shoulder Rest has a Screw feature allowing you to lower or raise the foot of the Wolf Shoulder Rest to your own specifications.
The Wolf Shoulder Rest has a feature enabling the player to lower or raise the foot further by turning the entire Screw Attachment around and re-inserting the Screw. This is why the Wolf Shoulder Rest Screw is of the utmost importance to the Shoulder Rest.
It is Much More Convenient, (And Much Cheaper!) to have the ability to buy spare parts, rather than having to replace the whole Shoulder Rest in the unlikely event that your original Wolf Shoulder Rest Screw should come loose and be lost.