Shimano also has a tool that might fit but you need to find out if the diameter is the same. Shimano TL FW40 Single Speed Freewheel Remover Y1200904T | eBay Another possibility is a BMX tool. Cycle Freewheel Remover BMX Single speed cog removal tool - Tobe | eBay You could also grind down the notches of the Suntour tool, or as mentioned, make your own. IMO unless you plan on keeping this freewheel or buying another Diana brand I would just take it to a shop since you may never need the tool again and cheaper than buying one.