A Poly coated plastic handle made to not crack or break with stainless steel wires staple set into the handle. The Stainless Steel Detail Tooth Brush. Is a single sided toothbrush for getting in and all around parts that need to be clean. The strong steel wires provide long durability and a tough build to clean any greasy grimy part. great to us in engine compartments in areas you just cant get to. .5" wire bristles and a 7025" brush helps out with the reaching.