DESTEK has one of the largest product ranges of gas springs in the world. There are only a few companies having a capability of producing so many different types. GAS TRACTION SPRING (GT-LIFT) The "Gas Traction Spring (GT-Lift)" has an opposite working principle to our Lit type gas spring. The feature which makes the difference is that the Lift gas spring is a "Push" device which always tries to open itself. On the other hand, the GT-Lift gas spring is a "Pull" device which is trying to close itself.