Workpro double-ended key set, consisting of 9 pieces. The dimensions of the keys are as follows: 6x7 mm, 8x9 mm, 10x11 mm, 12x13 mm, 14x15 mm, 16x17 mm, 18x19 mm, 20x22 mm, 21x23 mm. They are made of chrome vanadium steel with a matte finish.