Here's a safe and easy way to clean those hard to reach places like wheels, motorcycle parts and engine bays. The long handles are made from a solid extruded polypropylene that's flexible yet strong when scrubbing is needed. The patented ultrasonically welded micro fiber brush heads were designed so no metal was used, eliminating the possibility of scratching painted surfaces. There are no adhesives that could dissolve and allow the fiber to fall off. The large one is 12" long with a 2 1/2" x 1 1/2" micro fiber head and the small one is 8 1/4" long with a 2 1/2" x 1" micro fiber head.