SPH CordWrap Box Fan Handle - Lasko 

If it is difficult to remove the old handle, push down on the center hard, lift up one of the sides. That side should pop out. Bend the center of the handle down, while trying not to push the side you just removed back in. Pull up the other side. The handle should break free. If it does not, turn the handle side to side several times to dislodge the locking clip. It is recommended to leave the old handle intact should the new one not work out well. If it is difficult to insert the new handle, press in the tabs on the inside of the handle, while pushing down the handle. The box fan's handle holes may flex. TROUBLESHOOTING; If the new handle pops into one side but won't pop into the other, you will need to bend up the metal on the offending side of the handle hole. This will allow the clip to seat into place.