Originally Posted by
davidad
If you don't have a vise you can use the QR to hold the tool in place and hit the wrench with a hammer. Crude, but it works.
Bad advice. I hate to post corrections but frewheel removers are heattreated to a high hardness for maximum strength. Unfortunately this makes them somewhat brittle. There's a good chance that the prongs will fracture rather than drive the FW if you hammer on the wrench. A steady hard pull with a wrench that comes out as far as the rim for max. leverage, or the vice and turning the rim are the two ways to go.