Lock break times, and lock benefits. Locks are tested to pass STAGE 1 attacks - 5 minutes manual attacks, with hand tools. All tested locks have the time given at failure at STAGE 2 attacks - with power tools (angle grinder, disc cutter) 18mm: ______ Kryptonite New York Fahgettaboudit Mini [18mm] TEST - http://www.bikeradar.com/gear/category/accessories/locks/product/new-york-fahgettaboudit-mini-16565 STAGE 2 = 3 minutes Benefits = Obvious. The strongest U-lock there is. Kryptonite New York M-18 [18mm] STAGE 2 = Unknown Benefits = Similar to Fahgettaboudit Mini, so extremely strong. Though longer means more exposed for leverage. Master Lock Street Force 10 [18mm] STAGE 2 = Unknown Benefits = Unknown Xena Bullett XUL series [18mm] {Alarmed lock} STAGE 2 = Unknown Benefits = Anti-corrosive, and stainless steel is very hard. 16mm: ______ Abus Granit Extreme 59 [16mm] (10 tons pull resistance) TEST - http://www.bikeradar.com/gear/category/accessories/locks/product/granit-extreme-09-33988 STAGE 2 = 2 minutes Benefits = Double locked square shackle, means the bar must be cut twice, because it cannot be twisted after one cut. Abus Granit X-Plus 54 [13mm] (7 tons pull resistance) £55.99 TEST - http://www.bikeradar.com/gear/category/accessories/locks/product/granit-x-plus-54-10512 STAGE 2 = 1 minute Benefits = Double locked square shackle, means the bar must be cut twice, because it cannot be twisted after one cut. Abus Granit Power 58 [16mm] STAGE 2 = Unknown Benefits = Heavy and strong, but not square shaped, round. Blok ALA600 [16mm] STAGE 2 = Unknown Benefits = Unknown Kryptonite New York 3000 [16mm] TEST - http://www.bikeradar.com/gear/category/accessories/locks/product/new-york-3000-10498 STAGE 2 = 2+ minutes Benefits = Excellent, and heavy duty. Onguard Brute X4 [16.8mm] STAGE 2 = Unknown Benefits = X4 locking system means more than one cut is required, as it can't be twisted. Excellent strength. Onguard Brute [16mm] TEST - http://www.slate.com/id/2140083 STAGE 2 = Unknown Benefits = High density steel. Excellent 16mm lock. Oxford Magnum Short [16mm] STAGE 2 = Unknown Benefits = Unknown Oxford Magnum Long [16mm] STAGE 2 = Unknown Benefits = Unknown Trelock BS 510 [16mm] TEST - http://www.bikeradar.com/gear/category/accessories/locks/product/bs510-16559 STAGE 2 = 30 seconds Benefits = Best value, and strong Trelock MB 600 [16mm] STAGE 2 = Unknown Benefits = Trelock's best. Trimax MAX90 Ultra Max [16mm] STAGE 2 = Unknown Benefits = Unknown ------------------------------------------------------------------------------------ Chains: [16mm minimum] _____________ Almax Immobiliser Series III STAGE 2 = Unknown Benefits = Unknown Almax Immobiliser Series IV [19mm] STAGE 2 = Unknown Benefits = The biggest, strongest chain ever, for 2 wheeled security. Colossus chain STAGE 2 = Unknown Benefits = Unknown PJB Untouchable STAGE 2 = Unknown Benefits = Unknown Pragmasis Protector TEST - http://www.bikeradar.com/gear/category/accessories/locks/product/protector-chains-31679 STAGE 2 = 2+ minutes Benefits = Does what it says on the tin. Squire Ex-Caliber SS65 TEST - http://www.bikeradar.com/gear/category/accessories/locks/product/ss50csg3-16481 (SS50 13mm chain, estimate for 16mm below) STAGE 2 = Roughly 2+ minutes (extrapolated from 13mm test, for 16mm result) Benefits = Excellent. ------------------------------------------------------------------------------------- Armoured Cable Locks: (substitute security, NOT primary security) ___________________ Abus Steel-O-Flex Granit X-Plus 1050 TEST - http://www.bikeradar.com/gear/category/accessories/locks/product/steeloflex-granit-1000-16399 STAGE 2 = 90 seconds Benefits = Excellent for its type.