Brass coupling and one-piece, looped and wound brass shank with extra-thick, kinked, phosphor bronze bristles give the hard scrubbing action needed to cut through the tough crud and fouling.YouX'Xll have to push like the dickens, but the results will be worth it. Mfg: Brownells SPECS: Bristles: Phosphor bronze. Shank: Brass, looped and wound. 2-1/8 (5.4cm) OAL, 8-32 thread.
