Double ended, molded plastic handle multi-purpose cleaning toothbrushes. One end with a single row and the other end with 3 rows. Each brush is constructed with a cut out notch to provide better cleaning motion on parts. Perfect for any detail cleaning work with small or large parts that have grooves or threads. Available in 3 different fill options, white nylon, stainless steel or brass. Some recommended uses are weapon cleaning, channels, metal or plastic parts. These brushes are manufactured in the U.S.A.