Spring for AUTOMATIC opening mechanism to Dhollandia roll stops or trolleys stop. It is mounted in all the clamps produced after 2002 and under each clamp there are usually 3 pcs. Their shape as seen in the picture resembles a V. You understand that you are in the presence of an automatic stop because for the opening is provided with a pin that protrudes from the platform that must be hit with a foot. Moving it from its position, unlocks the flap that thanks to these springs rises instantly. ATTENTION: Dhollandia has another system of roll stops called "MECHANICAL" which mounts springs similar to this one but slightly different. The AUTOMATIC system has one of the two arms of the slightly raised V, while the springs of the MECHANICAL system are completely flat.