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-high crown working face of the Bike Builder Motorcycle Forming Head measures 8-1/2in. 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, square steel tube or mounted in a vice. Average weight 24 lbs.