It is a very important auxiliary tool of cylinder core pulling tools or KIR-35X cylinder breaking tube pulling set. It is a product for easy screwing of special pulling screws no.1 to lock cores. The screwing process can be done much easier and controlled.
The most important feature:
When installing the pulling screw no.1, the screw head does not peel off because it is inside the apparatus and the star tips will not come back. This means that the screw does not damage the head and bit tip. So you can screw the puller screw into the core of the cylinder more forcefully and smoothly.