WR-FH10 Wrench September 14, 2019 by WR-FH10 Wrench Item Description WR-FH10 Plastic Wrench For Standard Fh-10 Filter Housing WR-FH10-RH Plastic Wrench For Standard Fh-10 Filter Housing WR-FH10-1/2 Plastic Wrench For Slim F-10 Filter Housing 1/2 Circle