11mm hardened Ni-Cr-Mo alloy steel shackle. (No longer includes pouch or reminder). Hardened disc lock with double locking system. Solid Disk Lock. This is a great lock at a great price, it's heavy, will be difficult for the scum thieves with their angle grinders to cut off yet not impossible.
I have three of these locks fitted to my bike two on the front disc's and one on the rear sprocket.These are sold secure gold they appear to be made very strong but I still use heavy chains and Oxford HD lock's and ground actors when parked at home.