PFERD Spiral Band Rubber Drum Holder 25mm x 25mm 49900049PFERD Spiral Band Rubber Drum Holder 25mm x 25mm . The high degree of fitting accuracy between the components ensures that the abrasive spiral band remains securely attached to the rubber drum holder during use. The slots on the rubber drum holder expand during use, guaranteeing that the abrasive is firmly clamped in place. The secure attachment of the abrasive spiral band is only guaranteed if the minimum rotational speed is observed Abrasive spiral