Fits Filters from 2 1/2" to 3 1/8". Removes all oil filters from 2 1/2" to 3 1/8" in diameter. This extra large range enables the 63600 wrench to fit most all import car filters plus the common 3" domestic car filters. Steel jaws grip filter without slipping. Works in tight spots from the front of the filter using 3/8" drive.