COMPASS AH-3/AH-3T Arch Hold DownIn Stock AH 3 AH 3T Arch Hold Downs A Woodworking Hold Down Youve Never Seen Before! Almost every woodshop has some Hold Downs (or Holdfasts) because they are essential to secure the workpieces in place for safe operation. Hold Downs have been around for centuries, but most of them still need to be satisfactory. One of the flaws of the regular hold downs is that they are designed in deformable Cantilever Structures. When holding force is applied, the