Allen keys hex, ball 2-10 mm, set. 9 pcs. • professional set of allen wrenches with hex tip • set packed in a practical and handy plastic hanger, which makes it easier to find the right size of the key • the wrenches are made of high-quality chrome vanadium steel Cr V 6150, characterized by strength and resilience • hex keys have hardness of 52-55 HRC Dimensions of the wrenches: (length x width) • 2. 0 mm - 81 x 16 mm • 2. 5 mm - 88 x 18 mm • 3. 0 mm - 95 x 21 mm • 4. 0 mm - 109 x 23 mm • 5. 0 mm - 121 x 28 mm • 6. 0 mm - 135 x 31 mm • 7, 0 mm - 145 x 33 mm • 8. 0 mm - 157 x 35 mm • 10. 0 mm - 174 x 39 mm