Key FeaturesMultiple Caliber OptionsA Necessity for ensuring bore cleanlinessDetailsBore Brushes are ideal for most bore cleaning jobs. These brushes provide a thorough multi-directional scrubbing action. The bronze bristles return to their original shape and are very durable.Size: Required.17 to .20 .22/.223/5.56MM .243/6MM .270/6.8MM .284/7MM .30-30/.308/.30-06/7.62MM .338/8MM .45/.45-70/.444/.410/.416/11MM .50/12.7MM .264/6.5MM 20 Gauge 12 Gauge .380/.357/9MM .40/.41/10MM .44/11MM .45/12MM