Hex keys are used to turn bolts and screws with an hexagonal (six-sided) indentation in the fastener head compared to Torx keys that are used to turn screws and bolts with a six-point, star-shaped indentation.
Hex keys are used to turn bolts and screws with an hexagonal (six-sided) indentation in the fastener head compared to Torx keys that are used to turn screws and bolts with a six-point, star-shaped indentation.