Abstract: A fastening disk for use in attaching sheet material to a substrate, comprising:(a) a disk plate with a substantially discoid concave proximal surface for positioning facing the sheet material to be attached,(b) concentric inner and outer tubular posts extending from the distal surface of the disk plate,(c) radial struts connecting the inner and outer posts, and(d) radial vanes on the distal surface of the disk plate between the outer post and the periphery of the disk plate, the disk being compressible to reduce the concavity of the disk plate.