Mason's Acid Brush - Threaded Hole by Marshalltown Tools Save Liquid error (product-badge line 32): -Infinity% $6.99 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Has 1 1/4" (32mm) long white Tampico fiber bristles set in a wax tumbled hardwood block Very densely filled to hold large amounts of acid solution Usid with acid solutions for cleaning mortar from bricks Has a threaded hole for a broom handle