- a disposable shaver (gillette blue);
- a flat file for metal;
- an electric drill with a 2mm drill bit;
- electric cable 2mm diameter.
The first step is to cut a 10cm piece of the cable. Then remove the copper wire from the inside of the cable, and discard it, thus leaving just the rubber cover.
Then you have to put the rubber cover over your tool handle.

The second step is to cut off the head of the shaver (just before it begins to curve) so that you are left with just the handle. Then round the edges of the handle with the flat file. Now you can drill two holes next to one another through the center of the top of the handle. Then you need to use the drill bit to try and connect the two holes together, to create an oval shape. Notice, you will only have to drill a small amount of material until you reach the groove of the handle.

The third step is to put the tip of your tool through the groove of the handle, and through the hole at the top. Then you can push down the end of the tool into the groove so that it is gripped tightly into place.

This is the final result.

Hope this helps
