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Retractable fibreglass , brass & steel pencil brush options – Pencil Type, Ideal for surface cleaning and removing corrosion on watch battery contacts, pc boards & other electronics . You can use before precious metal acid testing, removing suspected plate metal. Create a unique texturing effect. Clean you jewellery pieces. Used to get into the crevices and corners to remove dust, dirt and rust easily with simple brush motions. Ideal for corroded electrical contacts, removal of paint and varnish on small objects or soldering iron tips. Can be used to prepare copper tracks for soldering.