Wrench spark plug original air cooled For Harley-Davidson

OEM replica wrench works with the stock style air cooled M18 x 1.5 spark plugs, the OEM styled wrench works with modern spark plugs like the Champion D-14 and D-16. Works on all Harley-Davidson singles 1926-1934, all 45CI models, all Flathead Big Twins and all Knuckleheads.