Roughneck® Stringer Bead Wheel, 4 1 2 in dia x 3 16 in Face W x 5 8 in 11 UNC x 0.020 in, 15000 RPM, 5 EA CT no checkout Heat treated for greater durability on Heat treated for greater durability on the job Electronic coating for ultimate rust prevention Four sizes in each wrench saves time All weather super detergent action cleans as it solders Non acid Contains no zinc chloride Use with all common soft solders including: tin silver of Knots 38 Prop 65 YES Quantity 5 EA CT Quarterly Flier NO Special Order NO Speed [Max] 15000 rpm Stock Status In Stock Trim Length [Nom] 13 16 in Type Stringer Bead Eliminates knot movement resulting in the most effective cleaning action