• Chrome vanadium alloy steel construction for strength and durability.
• U-Joint sizes: 1/4, 3/8 and 1/2".
• Adapter sizes: 1/2 to 3/8", 3/8 to 1/2", 3/8 to 1/4" and 1/4 to 3/8".
• heavy duty chrome vanadium steel
• Reusable socket rack. To release the sockets, twist the sockets counterclockwise until you hear it click.
• Note: Use cutting pliers to snip the plastic above the "CLOSE/OPEN" icons (one time only).