I was invited to an online build day - a bunch of Instructablers got together via a Google Hangout, and this is my build - a quick and easy hack** to help Kitewife do crochet on the move. As well as being allowed on airlines, these shortened hooks are easier to handle in the confined space of economy class, or the passenger seat of a car.
*For example, American Airlines do not allow scissors longer than four inches, or "tools" longer than seven inches [link], which may be interpreted by some officials as "no crochet hooks"). Thanks to Sunshiine for reminding me about this point.
**Lifehack, modification and improvement of the product, all in one quick Make!
Step 1: The materials
The size of the hook isn't important, but you may find thinner hooks trickier to drill without a drill-press.
Step 2: The Make
I cut off the hook at a length that was short enough to fit in a purse or pocket, but long enough to still be handled.
I then drilled a hole in the shaft of the hook, trimmed off the corners with a sharp knife, and then filed the edges smooth to prevent snagging on the yarn.
Step 3: Metallica
A donated 4mm hook became the next to be modified. This one, though, was metal (aluminium, I think), so required slightly different techniques.
I trimmed it to length with a cutting wheel on a rotary tool, rounded it off with a grinding bit, and drilled the hole with a twist bit instead of a wood bit.
The end result, though, works out the same - a shortened hook that can be used on the go.