Click-Clack, often called Clacky by Garby, is a Rotilian Reptool who is clumsy, pantophobic and tends to fall down a lot. He is normally concerned with running away and hiding, in his own words, tending "to avoid danger at all costs". He even stated that he uses "Tool tips" that he hopes will help him survive in th world, and once said that he "knew a Tool who lost three bits to frostclamp". Sometimes, he even gets scared enough to lose all of his own bits, and is teased by the other Tools for this, particularly Ace. Despite his cowardice and constant worrying, he has managed to pull off a few acts of bravery from time to time.
Like most Rotilian Reptools, Click-Clack is outfitted with various construction tools such as a drill and screw driver. He is also able to launch bits from the nozzle on his forehead as a weapon.