Driver for BCM cylindrical brush - Driver for BCM cylindrical brush - Materials: Body: glass reinforced polypropylene except BCM110 which is aluminium Set screw: stainless steel 316L - Resistant to acids, alkalis, and harsh light Usage - Required for holding brushes in place and to ensure rotation How to choose - Brush and collar should have identical body and bore diameters irrespective of bristle density. Two collars required per application.