The 4 Screw Pole holder is attached onto the banner stand with screws. This pieces has grooves that allow you to slide the bottom of the pole into the banner stand and attaches the pole into the banner stand. One 4 Screw Pole Holder is used for our 33" Retractable Banner stands while two 4 Screw Pole Holders are used in our wider 47" and 57" trade show displays.