- Material pull body 45 # carbon steel, chrome vanadium steel ratchet wrench. - Surface treatment: polished chrome - Heat treatment hardness - Pressure and Erosion Resistant - Good abrasion performance and rust prevention - Suitable for Long Time Industrial Usage - Flexible rotation, mainly used in auto repair machine repair. Specifications: Gear Type: 12-point 72-teeth Swing Degree: 5° Measurement Standard: Metric Material: Chrome Vanadium Steel Application: The flex-head ratcheting wrench set is easy to use in a small space, perfect for cars, bicycles, equipments, professional maintenance. Size: 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm Package include: 1pcs of Ratchet Wrench