Sirius Long Hexagon Allen Key Metric

This Sirius Long Hexagon Allen Key is sized at 5mm, a widely used metric size found across automotive, engineering, and construction applications. Its popularity means it is frequently the first key reached for when tackling hex fasteners in general maintenance or assembly work. Made from alloy steel, it provides excellent strength and resists wear under regular use. The long arm gives extended reach into deeper or recessed fixings and delivers more mechanical advantage, making it easier to apply the required torque efficiently.