1/2" x .072 WG Steel Torsion Springs SPRT-120 (12 pcs.)

Diameter: 1/2"
Diameter 2: .072"
Material: Spring Steel
Type: Torsion Spring

Box of 12.

A torsion spring is a spring that works by torsion or twisting. The amount of force (actually torque) it exerts is proportional to the amount it is twisted.