SIZE: large size brush handle length is 13 cm/ 5.1 inches, the brush head length is approx. 4 cm/ 1.6 inches, and the brush head width is 1 cm/ 0.4 inches DURABLE MATERIAL: Stainless steel, nylon and brass copper each 5 pieces, strong and durable, can clean rust and detail completely. WIDE APPLICATION: suitable for cleaning steel parts, machinery, the unfinished metal parts, paint stains, special corrosion without damaging surfaces or fine features.