grinding head 1)wool felt bobs,polishing felt bob 2)Can be mounted in a drill grinding head1)wool felt bobs,polishing felt bob 2)Can be mounted in a drill Features and usage: 1. Felt bob is according to customers' requirement, select different quality class, high density felt, is cut by mechanical stamping mill, made of various shape felt bob. 2. Felt bob have Elasticity, toughness, cross- strong ...