Locksets which come under the doorknob assembly are available in differing levels of security and wide range and variety of styles.They can be bought from any of the hardware store (Lowe's, Home Depot).These locksets can be ornate in brass and can cost from twenty dollars upto three hundred to four hundred dollars.It doesn't matter which design or style of lockset is being used, the procedure of installing or removing them is more or less same.Most of these sets are easy to install and can be easily taken apart, especially those which you might have bought from a specialty or department store.Amongst the most secure and inexpensive locksets are known as Brinks Locks.Two basic locksets available are the spring latch and the deadbolt.Although spring lathes are much easier to install but the deadbolts are more secure.Deadbolt Locks. The knob outside has a keyhole while knob inside has the button for locking.1.Firstly, unscrew the inner knob.Usually it has 2 exposed screws; you simply have to remove them.Outside portion is free; inside half will pull off and hence by pulling it out, it can be removed.If you are not ale to visualize the screws, you should look closer and check for a small button along the shaft.2.Then remove the cover finding small notched opening.Then slip your screwdriver and pop off the cover.3.Remove 2 screws that hold the lock and the faceplate can be removed easily.Assembling the locksets. The procedure of assembling is the same as the dismantling but the only difference is that it is done in the reverse direction.1.Firstly insert the lockset in the opening from the outer side.2.Now, using 2 screws install the faceplate.3.Snap the cover along the bent wire latch which holds it in position.4.Then depressing the latch on shaft, slide the knob on the shaft.5.At last, check your lock by locking and unlocking it several times and make sure that the key should move freely.

Two security products have come to dominate the practice of screening people and possessions for possible risks or contraband.The X-ray scanning system and the metal detector are two technologies used throughout the security sector to screen entry to airports, prisons, banks and other VIP areas - and the chances are they are the only system that most people will have any familiarity with.The major benefit to these systems is one common to most technological solutions - they remove much of the scope for human error in security screening.In most of their applications, such as airport security, they also mean that large numbers of people can be processed effectively without compromising security protocols.In fact, these systems beat physical searches in terms of both convenience and capabilities.This isn't just because most physical searches are largely perfunctory and can also be massively disruptive, depending on the circumstance (imagine if everyone had to unpack and repack their luggage at the airport) but also because a physical search has to exhaust every possible hiding place one by one.With an X-ray machine, you can see both within bags and luggage as well as within the objects contained inside - and without ripping them to pieces.Items that appear perfectly normal in their outside appearance can often contain contraband or even explosive devices and when passed through an X-ray machine, these objects can quickly be identified by trained staff.Similarly, a metal detector can easily control access to a secure zone on an individual basis.Guns, knives, conventional explosives and other metal-rich devices are all impossible to sneak past a metal detector, no matter how well hidden they are.Even if someone was to surgically implant such a device - which is needless to say, an extremely far fetched scenario - they wouldn't be able to pass through a metal detector without setting off the alarm and drawing the attention of security personnel.These systems are so effective at security screening that the reality is that most of the time, they'll never actually detect a dangerous device (though X-ray machines at airports may often catch alcohol, tobacco or other goods before customs).This is because the only way to get around them is generally to avoid them completely, so they essentially act as a supreme deterrent and a near sure-fire way of catching those too foolhardy to be deterred.