These Forming Heads will allow you to produce compound curves appropriate for motorcycle and automotive fenders,gas tanks, patch panels and more. Sand-cast from malleable iron for long term creativity. Can be used in.as isin. of finished with your sander to smooth or customize the shape. The low crown working face of the Tank Shaper Motorcycle Forming Head measures 10-1/2in. long by 4-1/2in. wide by 2in. deep. Square mounting stake measures 6in.long with radiused corners tapers from 2 1/4in. to 1 3/4in., can be dropped into a 2in. square hole in a workbench, piece of square steel tube or mounted in a vice. Average weight 24 lbs.