A collection of tools, each designed with a hexagonal (six-sided) cross-section, is used to turn screws and bolts with matching internal recesses. These tools are available individually, or more commonly, as a packaged assortment offering a range of sizes to accommodate various fastener dimensions. A typical collection might include metric and imperial sizes, sometimes with both ball-end and straight-end variations for access to recessed fasteners at different angles.
The simple yet effective design of these tools provides high torque with minimal applied force, making them indispensable for assembly and repair in many fields. From furniture assembly and bicycle maintenance to electronics repair and automotive work, the availability of a properly sized tool from such a collection is essential. Their compact nature also makes them ideal for applications where space is limited. The design’s origins trace back to the early 20th century, addressing the need for a more efficient and damage-resistant method of driving screws with recessed heads.