STEP 1

Hold the magazine in your left hand oriented as shown to the left.  Hold the Glock armorer's tool in your right hand.  Insert the tool through the hole in the floor plate.  Push it down all the way while pulling the tool to the right.

STEP 2

Pull the tool to the right until the floor plate comes off. 

Be careful of the spring coming out.

STEP 3

Remove the spring, follower, and insert.  Replace the spring, follower, and insert with the new parts.

STEP 4