Abstract: An angularly variable device for use on a door having a closer piston with a piston arm wherein the angularly variable device is a protracting blocker comprised of a first section and a second section. Each section comprises a wall from which extends at least one tab extending perpendicularly therefrom. From the wall extends generally perpendicularly at least one but preferably a plurality of tabs so that the at least one tab on each of the first section and the second section rests on top of the piston arm. A retainer presses against an elbow joint forming part of the piston arm so as to firmly press the wall against the piston arm so that one side of the blocker is pressed against one side of the piston arm while the retainer presses against the opposite side of the piston arm so as to provide a secure installation of the blocker on the piston arm.