Assemble the shoulder rest. Three parts will be included in the package: two pins attached to feet and the shoulder rest itself. The tall pin fits into the narrow side of the violin while the shorter one screws into the thicker side. No tools are necessary; just screw the two pins in place.
Unscrew the two screws on either side of the shoulder rest. The screws will look like small knobs that turn to loosen the shoulder rest and allow it to expand or contract to fit the fiddle.
Place the rubber feet over the bottom edge of the fiddle, and then slide the other side of the shoulder neck around the outside portion of the fiddle. The small part of the shoulder rest goes on the portion of the fiddle closest to your neck. If the shoulder rest feels loose, tighten the screws to create a secure fit.