If youre referring to the black plastic Perkos with the chrome handle, they have a set screw on the back that tightens down on the flat side of the threaded shaft. Mine are adjustable anyway.In case theyre bent,If its the threaded shaft on the lock thats noticeably bent Ive straightened mine by taking a crescent wrench and placing it on the flat side of the stem and slowly bending it back straight. If its the actual latch piece with the set screw on the back you can remove it and straighten it using a vise and a crescent, or by placing a pry bar or 1×4 between the edge of the lid and the latch. Just be slow and careful. Its made of cast aluminum.