• 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).
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