From Oxford Products website (see https://www.oxfordproducts.com/motorcycle/brands/oxford/security/chain_locks_and_chains/oxford_hd_max_chain_lock/).
Mine is 1.5m and includes three keys (two never used). Weighs 5kg.
Costs ~£75 or €85 new.
Worked! Have videos of attempts to steal but would-be thieves couldn't break lock.
Will ship free within Ireland with tracked AnPost mail. Happy to ship internationally at cost - contact me for information.

'The Oxford HD Max Chain Lock is our best value protection and the most competitively priced Sold Secure Powered Cycle (Motorcycle) GOLD product available today. Light enough to take with you but strong enough to give reassurance.
Chain
• 12mm chain links made from hardened Ni-Cro-Mo steel.
• Long links reduce weight.
• Zinc coated to prevent corrosion.
• Cloth sleeve protects paintwork.
• Case hardened chain resists bolt cutters.
Padlock
• Tough double locking padlock with 14mm hardened steel shackle.
• Padlock with anti-pick and anti-drill lock cylinder.
• Doubles as a disc lock.


This product has met the high demands of the Police Preferred Specification and has been accredited Secured by Design (SBD).