Description This is a high-quality 5-piece extension bar set designed for 3/8" square drive tools. Made from chrome vanadium steel that is hardened and tempered, these extension bars are durable and resistant to wear. They feature a polished chrome finish for corrosion resistance and a professional appearance. Each extension bar has a knurled ring to ensure a secure grip during use. The bars are equipped with a spring-loaded ball bearing to securely hold sockets in place, preventing accidental disconnection. Suitable for various DIY and professional applications, these extension bars help reach fasteners in hard-to-access areas. Specifications Material: Chrome vanadium steel Finish: Polished chrome Drive size: 3/8" square Number of pieces: 5 Lengths: 45mm, 75mm, 150mm, 250mm, 450mm Manufactured according to DIN3122 and ISO3315 standards Compatibility and Accessories Compatible with 3/8" drive sockets and ratchets Suitable for use with various hand tools and power tools that accept