I need to screw some hooks into a hollow core door, so I'm trying to use molly bolts and I'm having some problems with them.
When I insert them into the hole, I tried using a hammer to lightly tap them in until the spikes on the rim of the bolt get some purchase in the wood, but with about 90% of the bolts, the inside expanding portion falls off inside the door.
If I don't tap them into the wood, the spikes bend and flatten against the rim when I try to screw the bolts in, then the whole thing just spins like a stripped screw.
I also tried holding a flat blade screw driver against the rim to hold it while I tightened the molly bolt, but that's too difficult to do and I just wound up with scratches across the back of the door.
What am I doing wrong?