This is a BoreSnake Bore Cleaner known as the BoreSnake, model 24018VD.
Everything you love about the BoreSnake plus better cleaning and superior strength. One pass loosens large particles" scrubs out the remaining residue with a bronze brush" then swabs it all spotless with a cleaning area 160x larger than a standard patch.
Features:
Cone-Shaped Bore Guide
Integrated Bronze Brushes
50% More Brush Cleaning Power