Perfect for when the force is unknown, one-off jobs & prototypes. Adjustable force gas struts come pre-set to the maximum force the gas strut is rated to. There is a release valve at the end of the strut which allows gas to be vented out of the strut, lowering it's force. This allows fine tuning while the gas strut is still mounted to achieve the perfect operation. If you are unsure which rod diameter gas strut you need please contact our team.