The hexagon socket head screw is broken. Is there any way to take it out?

To take out the broken socket head cap screw, the materials to be prepared are vernier caliper, metal grinding strip, wrench, pen and angle grinder.

First, use vernier caliper to measure the peripheral dimension of hexagon socket head screws.

Secondly, measure the size of the inner jaw of the wrench.

3. Mark the size of the inner claw of the wrench on the hexagon socket head screw.

Fourth, then use an angle grinder to polish according to the mark.

5. Grind into the shape shown below.

6. Then grind with a metal grinding strip.

Seven, and then use a wrench to unscrew the Allen screw.

Eight, so you can take out the broken hexagon socket head screw.