Improving a 3'rd hand

Step 4 Hot shrink tubing

To avoid scratching/damage to curcuit boards, you can add hot shrink tubing to the tips of the crocodile clips.

You will need some 3 mm. ID hot shrink tubing, cut to pieces about 3 cm. long (pic 1)

1 - Put the pieces over the tips if the crocodile clips, and heat them. (pic 2 & 3)

2 - Add an extra layer of tubing, and cut it off. Leave about 0,5 mm. of tubing. (pic 4)