Tough, stainless steel band with permanently bonded textured coating for superior gripping power...won't slip. Swivel handle makes it easy to turn in tight spots. Handle swivels more than 180° with adjustable tension. Tension adjusting nut allows swivel pressure to be regulated...no more floppy filter wrenches. Coating process adds many additional gripping points to securely grab the filter. Specially designed tab keeps grip from sliding off the handle.