The Burg-Wächter GKM 2m Duo security kit is ideal for securing you valuable bike or belongings. The chain is made from case hardened steel which is hacksaw and bolt cropper resistant. The body of the lock is made of hardened steel and the 16mm shackle is made of case hardened steel, both providing tough resistance to attack. The shackle is secured by a double bolted disk mechanism locking both ends. The chain is Sold Secure Gold & the lock Sold Secure Diamond insurance rated for cycles. 2x GKM 2m 10mm Hardened Steel Security Chain 2x 100D Keyed Alike 16mm Double Bolted Hardened Steel U Lock Ideal For Securing Multiple Valuables - Both Locks Use The Same Key Heavy Duty 100D U-Lock Ideal for Securing up to 12mm Chains & Cables The Body of The Lock is Made of Hardened Steel & 16mm Shackle is Made of Case Hardened Steel Completely Detachable Shackle When Unlocked Due to Double Bolted Disk Mechanism Locking Both Ends These Locks Are Both Supplied Keyed Alike So Both Locks Open with The S...