(click to enlarge)

Manufacturer

Zio Tek (http://www.ziotek.com)

Retailer

CyberGuys (http://www.cyberguys.com)

Retail Unit Cost*

$0.05 (50 pack = $2.56)

Notes:

3 sizes available 1/4in.; 1/2in.; 3/4in.

(click to enlarge)

Manufacturer

Zio Tek (http://www.ziotek.com)

Retailer

CyberGuys (http://www.cyberguys.com)

Retail Unit Cost*

$0.64 (5 pack = $3.20)

Notes:

This model features an adhesive back.
Many cases lack a surface to which the
adhesive back can be affixed.
A varient w/o adhesive exists, too.

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Manufacturer

Velcro Industries B.V. / 3M

Retailer

Fastenation (http://www.fastenation.com)

Retail Unit Cost*

Uncut: $0.03/inch
Loops: $0.25/8" Loop

Notes:

Velco(r) Cable Management Solutions come in two formats: 3/4" * 5 yard un-cut rolls and rolls of 3/4" * 8" pre-cut straps with a loop hook, 45 count/roll. 3/4 * 12" sizes are also available.  Many colors are available.

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Manufacturer

Ideal Industries, Inc. (http://www.idealindustries.com/)

Retailer

Lowes Hardware (http://www.lowes.com)

Retail Unit Cost*

$0.62 (5 pack = $3.21)

Notes:

3/4"x3/4" and 1"x1" sizes available

(click to enlarge)

Manufacturer

Woods Industries, Inc (http://www.woods.com/)

Retailer

Summit Source (http://www.summitsource.com/)

Retail Unit Cost*

$0.10 (10 pack = $0.95)

Notes:

ITW Fastex (http://www.plastic-fastener.com) has significantly better wholesale pricing  (10,000 for $40, etc.)

This is an especially good example because it illustrates how you can add a control point where one did previously not exist.  An even better example would be a large retail P4 LGA775 Fan which is more prone to catch a cable because of it's excessive size and lack of an a self-contained fan grill.

The ideal use for the adhesive-back purse lock is to contain front-panel cables (audio, USB, sound), which are often of different lengths.  This is especially important with MATX form-factor motherboards where space is a commodity.  However, if a MATX board is mounted in an ATX case, there is often excess cable.

Before:  With the advent of SATA and the death of the floppy drive, the era of the ribbon cable is nearing.  However, until optical drives adopt it as the bus of choice, round cables should be used, but if flat cables are to be used by default, we should avoid using a cable ties.  Many times, when adding an optical drive to RTGs, techs using wire cutters to cut cable ties, which are applied too tightly, ruin the cables.  A better option  would be re-sealable clamps which incur less stress on the ribbon.  The ones depicted here have adhesive backs so that they can be affixed.

After:  Separate or Combined --- Plus images of other common sized clamps not ordered / featured here.

This is an excellent example use of a smaller purse-lock.  SATA cables are sensitive to extreme bend angles.  Cable ties aren't an option, and leaving the cable in a bundle in a knot doesn't present a professional appearance either.

When the X-Connect system is out of the budget, larger size purse-lock's are the perfect solution for containing excess power supply connections.  Even when no excess is in question, there is almost always a large bundle at the power-supply egress point. 

Velcro provides a very clean and professional appearance when purse-locks and cable ties are not applicable.