Disc shear plates are handy to mount heat insulation when pad warming a building. Drill a hole in the wall through the unsulation push the plate into the hole, the disc will press the insulation to the wall and you will drive a plastic spike in the disk shear plate center. The spike xepands the shank, fixing the okate firmlyin the hole. The following sizes are available: diameter 10mm of length 90, 110, 130, 140, 150, 170, 190mm.