Product Description:

• Self-tightening  key-less feature automatically increasing gripping force, high reliability, and stability.
• Special quenching treated key parts increases durability.
• Product color may various from silver to black. 

Product Features:

• Clamping Range: 3/16" - 3/4".
• JT 3, Jacobs Tapter 3 Mount.
• Accuracy: 0.005"