Block wrenches U-ring wrench set DIN 3113a. Industrial quality U-ring wrench Slim shape, optimal for tight spaces CrV industrial steel Matt dirt-repellent surface treatment 15° angle on the ring side Lifetime warranty 12 pcs Keys 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 mm.