Use 3/8" square drive tool. Coated with electro-black oxide finish for rust protectior.Cap type filter wrenches, made from 7 and 16 gauge steel, will withstand up to 115Nm (85lb.ft) of torque. Designed to grip like sockets, thereby minimising the possibility of crushed filters. Adaptor allows use with 3/8" or 1/2"Sq drive wrenches. Adjustable oil filter wrench Ø65-120mm.