FEATURING HIGH-TENSILE HEAT-TREATED CARBON OR STAINLESS STEEL WIRE DEWALT HP WIRE WHEELS OFFER LONG-LASTING AGGRESSIVE BRUSHING ACTION. AN INNOVATIVE INTERNAL HOLDING PLATE CONSTRUCTION PROVIDES HELPS TO REDUCED KNOT MOVEMENT AND HELPS TO INCREASED CONTROL AND BRUSH LIFE. DELIVERS SMOOTH PERFORMANCE WITH CRIMPED WIRE FOR FLEXIBILITY. WARNING: This product can expose you to chemicals including lead which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65warnings.ca.gov - Nickel (Metallic)