.
remove the puller.
hold the crank bolt up to the pointy thing.
the outside of the pointy thing must be BIGGER than the outside of the crank bolt . If it is NOT, say goodbye to the threads in your crank.
this is a pointy puller . do NOT use this puller on the crank bolt if the head of the pointy thing swivels around
this is a flat end puller . you can use this on a crank bolt but the crank bolt may still screw into the crank as you turn the puller bolt
.