Socket size: 5mm / 6mm / 7mm / 8mm / 9mm / 10mm / 11mm / 12mm / 13mm. Suitable for connecting 1/4" sockets or screwdriver bits. This set allows you to mix and match socket sizes for your sockets, ratchet handles, extension bars and other accessories. Heat treated chrome vanadium steel provides excellent durability and resistance to each impact movement. Made from chrome vanadium steel. Fully polished, mirror chrome plated finish resists corrosion and prevents rust to maximize tool life. Specialized chamfered ends with a spring-loaded ball at the end of the bar locks the socket in place for added safety and to prevent falls. Ideal tool for mechanics, engineers, carpenters or DIY enthusiasts. Features: Material: steel chrome vanadium. Socket size: 5mm/6mm/7mm/8mm/9mm/10mm/11mm/12mm/13mm. Features: Suitable for connecting 6.35mm sockets or screwdriver bits. Self-adjusting to accommodate many fasteners. Made from high-strength, heat-treated, impact-resistant chrome vanadium steel with corrosion resistance. Designed for vehicle maintenance, home assembly and disassembly, electrical maintenance. A complete impact socket adapter and reducer with hard to find conversions; eliminates the need for multiple impact wrenches. Allows greater flexibility for sockets and drive tools and maximizes the versatility of ratchets and sockets. Reducers and Professional-grade adapters lock onto sockets with spring-loaded balls and drive pins for a secure, tight fit. Contents: 9 socket adapters. Delivery quantity: 9 pieces/box Product color: silver Product size: 6.35 mm Note: Manual measurement, please allow 1-3cm error.