DIY Universal Tablet HandleGrip

Inspired by the Padlette and the HelloStrap, I wanted to make my own handle for a good grip on my tablet.
This one is intended to be cheap, really easy to make and adjustable to any device.

What you'll need:
  - A 30cm (12inches) long piece of nylon strap ; maybe more for biggest tablets, mine is 9,4"
  - 2 strap buckles
  - 2 rubber toric joints diameter 4cm (1.6 inches) (the use of flat joints might be a better choice though)

That's all folks!

ps: Sorry for bad spelling/grammar/vocabulary but english's not my mothertongue. I could add steps and instructions to make it but I thought the photos were self explanatory. 
Tell me what you think in the comments.