Specially designed wrench removes and installs hard-to-reach 3 (76mm) oil filters with a 15-flute end. Fits various flute designs foundon AC/Delco, Fram, Wix, STP, NAPA, Sears, Gard, Montgomery Ward, VW, Motorcraft and other filters. Use with 3/8 square drive tool or a 1 wrench. Durable steel wrench is zinc plated to resist rust. Be sure fluted end of filter matches wrench.