3.5" - 3.875" (88.9 - 98.4mm) range fits most popular 3.625" standard filters. Tough, stainless steel band with permanently bonded textured coating for superior gripping power. Handle swivels more than 180 degrees with adjustable tension. Tension adjusting nut allows swivel pressure to be regulated. Patent pending coating process adds many additional gripping points to securely grab the filter