While torque keys can sometimes be prepared individually, they are generally sold as sets, with different types available under other conditions. At first glance, the Torx keys look-alike like hex keys. However, the torx keys have a six-pointed star-like form instead of the hex key’s six flat surfaces. Torque key locks – bolts and screws – and torque (six-pointed, star-like) indents or holes in its head to tighten and undo fixes.