Adjust Torque Screw Driver

Explaination:
1、It can easily replacing the screw.
2、There are six kinds of screw,inner hexagon have four style,1.5,2.0,2.5,3.0and quincunx have two style Φ1.5 and Φ2.0
3、This new batch setup "stop"region itas the common screw driver when it turns to "stop"
4、It can be freely adjust the torque from 0 to 15 kg
5、The rigidity of screw can reach to 60-65 HRC