Performance Tool W147FB Battery Terminal Cleaner Fishbowl, Removes dirt, debris and corrosion to restore electrical contact. Hardened and tempered stainless steel brushes. Brushes are encased in a durable steel housing. Cleans both positive (+) and negative (-) terminals. For top and side terminals. Inside brush cleans battery posts. Cone brush cleans battery terminals. Large Fishbowl - ships as 1 terminal cleaner (not fishbowl)