This dusting brush attachment fits inside of your extension wand on Kenmore upright vacuum cleaners.
Grey. Typically part of the on board tool set on Kenmore Whispertone and other Kenmore upright vacuums that have tools on board. These is usually a spot that this brush snaps into on the back of your vacuum cleaner.
Kenmore Whispertone model 116.3989990 is an example of an upright Kenmore vacuum that uses this dusting brush.