Easiest Approach

• 1). Place locking pliers on the head of the one-way screw, and turn the screw counterclockwise until it comes out.
  
  
• 2). If you can't initially get a strong (or firm) enough grip on the one-way screw with the pliers, use a file to flatten the opposite edges of the head. This should improve the grip.
  
  
• 3). Turn the pliers counterclockwise, and remove the screw.
  
  

First Alternative

• 1). Buy a one-way screw extractor, which is a tool designed for you to place into the head of the screw. A screw extractor functions in the same way as a regular screwdriver but has two pins instead of a regular full-width head. These pins provide grip and won't ride up the the sloped slots of the screw's head.
  
  
• 2). Place the one-way screw remover into the the head of the screw.
  
  
• 3). Turn the one-way screw counter-clockwise until it comes out. The one-way screw extractor reverses the screw out of its frozen position.
  
  

Third Choice

• 1). Drill a hole into the head of the one-way screw with a power drill. Start with the smallest bit, and work your way up.
  
  
• 2). Use pliers to place the bit of a regular screw extractor into the head of the one-way screw.
  
  
• 3). Tap the head of the screw remover with a hammer.
  
  
• 4). Turn the bit counterclockwise to release the screw.
  
  
• 5). Tap the bit more firmly into the screw if it does not initially come out. If it still won't come out, enlarge the hole and try again.
  
  

Last Resort

• 1). Cut off the head of the one-way screw off with a hacksaw, or remove the head with a drill.
  
  
• 2). Grip the remaining shank of the screw with pliers.
  
  
• 3). Turn the pliers counterclockwise, and remove the screw.