5/16-INCH NUT SETTER: One of the five most commonly used SAE hex driver sizes IMPACT-RATED: Nut setter is engineered for the most demanding driving tasks with exceptional impact resistance RARE-EARTH MAGNET: Powerful Rare-Earth magnet securely holds fasteners, enabling effortless one-handed driving COLOR CODED: Hex size is color-coded for effortless identification EXTENDED REACH: 5-Inch durable shaft enhances both reach and accessibility