Part 1 of the series, How to Tie a Rope Harness Part I, is here.
Part 2 of the series, How to Tie a Frog Tie, is here.
Part 3 of the series, How to Tie a Shinju, is here.
Part 4 of the series, How to Make a Custom Dildo out of Ice, is here.
As you can probably figure out, most of these tutorials are really, really not work-safe.
This particular tutorial is work-safe, and describes how to make a very unusual style of collar that's perfect for clubbing, wearing to a play party, or whatever else you like. And if you make it from UV-reactive cable ties, it even glows under black light!
Putting it together
This collar is actually made of rubber O-rings and cable twist ties, both of which you can find in any hardware store for only a couple of dollars. The O-rings are normally in the plumbing section. The twist ties are available in a wide range of colors and lengths, and I've even seen them in UV reactive (flourescent) colors. The ones shwn here are neon yellow and glow under blacklight, so this collar looks great at a club.
You'll need one package of rubber O-rings (the ones I used here are 7/8") and some cable ties.
Use the cable ties to connect the rubber O-rings together as shown here. Tighten them down as tightly as possible, so that they'll stand straight out. Take care as you're connecting a string of O-rings together to wrap the cable ties in the same direction, so that the spacing between the ties will be uniform.
As you work, keep trying the collar on. When it's about the right length, put the collar around your artner's neck and connect the two ends of the string of O-rings together with a cable tie. That's it! You're done.
Since the rubber O-rings are generally more expensive apiece than the cable ties, I recommend removing the collar by cutting one of the cable ties rather than by cutting an O-ring. A pair of diagonal cutters, tin snips, or strong scissors works well; cut through the base of the cable tie without cutting the O-ring, so that you can put the collar back on again just by using another cable tie.
When you're done, the result will look something like this: