QNAP Screw pack for 3.5" HDD intallation, 96 pieces, Flat head machine screw

I was having all sorts of trouble with hard disks from escaping and causing no end of chaos. I decided enough was enough and to invest in a solution to keep them in their bays once and for all.
Having only four hard disks I was initially only in the market for a maximum of 16 screws, usually when buying screws they are available by weight since they are inexpensive to manufacture and counting them individually adds extra expense.
These screws came in a resealable plastic bag with 96 units so I was initially concerned that the amount of screws I would be getting would be difficult to justify as it would be unlikely I would ever get to ownin...view more I was having all sorts of trouble with hard disks from escaping and causing no end of chaos. I decided enough was enough and to invest in a solution to keep them in their bays once and for all.
Having only four hard disks I was initially only in the market for a maximum of 16 screws, usually when buying screws they are available by weight since they are inexpensive to manufacture and counting them individually adds extra expense.
These screws came in a resealable plastic bag with 96 units so I was initially concerned that the amount of screws I would be getting would be difficult to justify as it would be unlikely I would ever get to owning 24 hard drives.
Each screw has a thread that fits the threads provided on standard 3.5” hard disks perfectly. The top of the screw has a cruciform shaped cavity which will accept a Phillips or Pozidriv type driver.
The drives are mounted in the computer chassis drive cage either directly or by attaching adapter rails. The cage or rails have mounting holes that align with the holes drilled in the hard drive body itself. One the holes are aligned you take four of these screws and one at a time you offer them thread end first up the holes through the cage or chassis into the holes bored into the body of the hard drive.
Care must be taken to ensure that the screw is perpendicular to the direction of the hole or it is possible to damage the threads should the screw be tightened at the wrong angle.
To tighten the screw, you place the pointed end of the screwdriver into the cruciform cavity at the top of the screw and turn the handle to the right or clockwise. The further you turn the screw the deeper into the hole it will go until the wider end reaches the hole at which point it will go no further. Care should be taken to avoid forcing or over-tightening the screw head into the hole as this can break the threads. Over-tightened screws can be difficult to remove in future in the event that the hard drive needs replacement or you develop debilitating arthritis.
Once the screw head has reached the hole a further quarter turn of the screw will tighten it enough to prevent it from falling out on its own and allowing the drive to escape.
With the screws in place the drive is secured and will no longer be able to roam freely.
To remove the screws in future, if required, over the pointed end of the screwdriver up to the cruciform cavity at the head of the screw and turn the handle to the left or anti-clockwise. Continue to turn until the screw falls out of the hole. Repeat this for each screw until the hard drive is free to be removed from the cage or rail system.
To summarise the pros and cons of the product:
Pros:
Stop hard drives from escaping.
Fit the mounting holes in most 3.5” hard drives
Can be turned both clockwise and anti-clockwise
Come in a resealable bag.
Cons:
Ludicrously expensive for essentially a bag containing a quantity of screws. They are not even made from precious metal.

I have been using the product for around six weeks and so far none of my hard drives have escaped.