1. Material: high carbon tool steel
2. Application: installation/removal tool for bicycle square hole center axle
3. Applicable: All kinds of square hole center shafts and shaft caps with 20 teeth can be used
4. Treatment: hardened by heat treatment, easy to use
5. Durable and not easy to break
6. Dimensions: 5x2.9x2.9 cm
7. Weight: 100 grams