Applications Works best on steel, aluminum and plastic. Features Handy universal deburring set with (4) multi-purpose blades to help you produce a perfect finish for a wide variety of jobs. Innovative blade holder has (4) folding shafts which can be easily locked into position for the duration of the work and then folded neatly back into the handle allowing the tool to be carried simply anywhere. Includes (1) S10 blade. (1) N2 blade. (1) D50 scraper blade. (1) 10.4mm countersink blade.