If you have purchased our adjustable tension hinges you simply use the allen key tool supplied with the hinges. You may have to remove the rubber protection cap first, this will pull straight out. To increase the tension use the hexagonal end of allen key turning CLOCKWISE. From the neutral position, you can increase the hinge tension 4 times. Each increase will be felt and you will also hear a pronounced click.
NOTE: All Safetech adjustable tension hinges are ONLY designed to turn clockwise and each hinge can be set to different tension levels. To return back to the neutral position, simply insert the other end of the allen key into the centre of the same hexagonal slot of the hinge and press down. If you have misplaced your adjustment tool, we can supply a replacement.
If you have purchased a fixed tension hinge these will need to be replaced, it is a fixed spring that cannot be adjusted.