• Universal joint set built heavy-duty for use with impact sockets in hard-to-fit applications
• Unique double-articulating joint more versatile for efficient torque transfer on difficult angles
• High-strength heat-treated Chrome-Vanadium steel with black-oxide corrosion-resistant finish
• Spring-loaded ball-bearing/receiver system to hold socket and wrench securely
• Set includes 1/4", 3/8" and 1/2"-drive universal joints

When you're dealing with stubborn bolts and a difficult angle-of-attack, these universal joints can be life-savers--and pay for themselves with just one use. One-year warranty and Jack's Tool Shed worry-free Satisfaction Guarantee.