KleenBore Patch Holder Bore Brushes are designed to provide faster, more efficient cleaning for hunting, law enforcement and military applications. They combine a premium bore brush with a slotted patch holder at the front end of the brush to create one integrated cleaning rod accessory. The Patch Holder Bore Brush puts more of the desired chemical in the bore to work by putting a patch in front of the brush and soaking it with solvent. The patch and phosphorous bronze bristles work in combination for more effective cleaning. The Patch Holder Bore Brushes work with any cleaning rod using standard 8X32 TPI and are available in both rifle and handgun calibers.