Shrouded Locks Defy Bolt-Cutters and Eliminate Security Threats of Cutting or Prying. Our Shackle Shroud Section Includes the Master Lock Solid Iron Shroud Locks (6321, 6325 & 6327), Plus Abus Granit (37/80 KA) and Diskus (20/70 KA). Padlocks. Other Locks with Protected Shackle Covers Include the Master Lock No. 185, No. 187 and No. 7045, and Abus 83CS/50 & 83CS/55 Locks.