1. The model is specially designed for the features of impact electric drill & electric drill, super gripping power.
2. For quick releasing of drill bits and not slip when drilling cement.
3. The jaws adopt alloy steel for manufacturing, durable for impact & friction and the precision can be lasted for a long time.
1. 10EL 1.5-10(mm); 1/16-3/8 " (inch) B12.
2. 13EL 1-13(mm); 1/32-1/2 " (inch) B16.
3. 16EL 3-16(mm); 1/8"-5/8 " (inch) J6; B16; B18.