Are chain door locks effective? Chain door locks are effective as additional security for an apartment or a house. They help in preventing an intruder from forcibly entering if the door is partially opened. However, they cannot be an alternative for stronger locks such as deadbolt locks.
Most of the best and most secure chains use hardened steel. Steel is extremely strong and hard to cut. Dollar store bike locks will be made from extremely cheap materials and can normally be defeated by hand.
U-locks are often considered the most secure with hard steel and strong locking mechanisms. Chain locks typically offer a bit more flexibility in terms of locking positions, and they're sometimes easier to carry when not in use.
You might not believe us, but many of the low-end cable bike locks can actually be damaged and removed simply with a pair of hands. If your lock is cheap and flimsy, its possible to snap it open simply by putting tension on it. Sometimes only a few strong pulls are necessary to open a cheap bike lock.
While Kryptonite don't guarantee it can't be bolt cropped, it would take a very skilled (not to mention big and heavy) thief to get through this chain.
unless you find a chain that was used on a battleship anchor, that cable is gonna be the way to go. We use a relatively thin gauge and it takes much more time to cut it than it does to cut a chain. It frays really bad - so at least the potential thief might be detured knowing that cutting the cable will take some time.
U-locks are very difficult to open by hammering or using force, but they are weakened and become brittle when cooled by air spray, meaning that they can be smashed open.
The terms 'U Lock' and 'D Lock' have long been used interchangeably, largely down to the preference of the person or manufacturer describing the lock. There's also the question of geography with D lock used more commonly in the UK and U lock in North America.
Grade 120 chain exhibits the strongest tensile strength of all steel alloy chains and is used for exceptionally heavy overhead lifting.
We carry Pewag Security Chains that are considered to be the toughest security chains out there. By being the toughest chain, we mean the Pewag chain is the hardest chain to cut with bolt cutters. The biggest reason is the hardened steel chain is squared, so it will not allow bolt cutters to cut through it.
A chain or door restrictor is a simple device that allows you to control communication with people standing on the outside of the door. These tools are typically just a couple of inches long, attached to your door and doorframe around head height. The chain prevents the door from opening beyond a crack.
Chain locks are made up of a series of hardened steel links (usually inside a protective nylon sleeve) and a lock. The lock can be integrated into the chain, or it can be a separate padlock.
The biggest bolt cutters (36 and 42″) are usually only used by serious bike thieves. But they can crop mid range u-locks and chains and sometimes even the higher end locks.
Thieves can quickly pop open the lock with a car jack or pipe, but there are ways to protect yourself.
The best bike lock
With a dual-locking hardened 13 mm shackle, an included cable, and a free year of anti-theft protection, the Kryptonite New-U Evolution Mini-7 is a good deterrent at a reasonable price.
Kryptonite New York Fahgettaboudit Mini
The New York Fahgettaboudit Mini is the only bicycle u-lock with a 18 mm thick shackle and it's undoubtedly the most secure bicycle lock available today. At 3.25", it's pretty narrow. But 6 inches in height makes it the longest of the three mini locks.
Overall, wire rope is stronger than chain. The multi-strands of continuous wires give wire rope its strength, whereas a chain is joined together with links. These joins are the weakest part of a chain and can break under heavy loads.
The Best Chain Has Hexagonal or Square Links
A heavy-duty, hardened steel chain with hexagonal links thwarts nearly every thief with a bolt cutter. Hexagonal links (or square or trapezoidal) make it impossible for bolt cutters to get a grip.
Master combination locks have a hardened steel shackle that cannot be cut with a standard hacksaw blade. The shackle is hardened steel to deter thieves from breaking it. However, occasionally you might misplace the key for one of these locks or forget the combination, preventing access to your belongings.
The Grade 70, 80 and 100 chains are impossible to cut with a bolt cutter.
The landlord is more likely to allow chain locks and sliding bolts than deadbolts or other types. However, before making any permanent holes, get the landlord's permission in writing.