Sprocket Wrench

[markfitz]

This tool was originally made to hold motorcycle countershaft sprockets from turning while removing/tightening the nut holding them to the shaft. I used a 16-inch piece of 1/2" steel tubing for the handle. I then welded a 16" piece of chain to the handle, 4" from one end. Dimensions are not critical, but you do want to have the chain running oriented toward the short end, as shown in the picture.