Features Clean threads, files, metal parts, and castings; remove rust, paint, scale, and solder. Stainless steel wire recommended to clean aluminum and stainless steel materials. Bristle Firmness / Stiff Handle Style / Curved Bristle Material / Brass Handle Material / Plastic Brush Length / 1 1/2 inch Handle Length / 5 3/4 inch Bristle Color / Brass Overall Length / 7 1/4 inch Bristle Length / 1/2 inch Brush Type / Wire Scratch Brush Head Length / 1 1/2 inch Grip Material / Plastic FDA Compliant / No Color Coding System / No For Material Type / Die-Cast Number of Rows/Columns / 3 x 7