Excellent set. with which you can effortlessly clean and cut the bottom of the injector hole in the diesel engine block cover. The set includes the most common sizes. In a plastic case. 14x14 mm Flat cut. 15x19 mm Flat cut. 15.5x15.5 mm Flat cut. 15.5x15.5 mm Angled cut. 17x17 mm Angled cut. 17.5x20.5 mm Angled cut. 17x17 mm Flat cut. 17x17.5 mm Flat cut. 17x19 mm Flat cut. 17x19.5 mm Flat cut. 17x20 mm Flat cut. 17x21 mm Angled cut. 19x21.5 mm Flat cut.