The nickel-plated wooden door piston hook is a piece of steel with a nickel-plated finish, intended to be placed on the inside of the module to hold the wooden door opening piston. It provides resistance and support, it is a fundamental complement for the installation of the piston and its materials allow it to support the weight cushioned by the piston. Each package contains a total of 100 units for wooden or aluminum doors PLUS 4-11-14-15-16-17-18-19. It is recommended to keep pieces of these sizes out of the reach of small children and in isolated storage to avoid their loss.