What do you do when the crank arm extraction threads strip out?
Repair them with the Stein Crank Extractor System:
Install the cutter pilot into the bottom bracket spindle:
Put the oversized tap onto the pilot:
Cut new threads:
Install the special Stein self extracting cap:
Rotate the cank bolt counter clockwise to remove the crank arm:
Now the crank arm is re-usable and better than new for only $25: