- Heavy spanner drill chuck
- High precision 1/2-20 UNF spindle thread
- High mechanical advantage easy to converts hand tightening torque into bit gripping force
- Perfect Compatible with hand electric drill machines
- We are a product retailer focused on the European market. If you have any questions, you can ask us. We will reply to your message within 3-8 hours. Our products will also be carefully checked for you before shipment Make sure there are no problems before sending the goods for you.