Allen Key 10Pk Metric (1.5-10Mm) Imperial hex key set Manufactured from high tensile steel Comes in folding open case Stanley Allen Key 10Pk Metric (1.5-10Mm)The versatile long arm/short arm design offers extra reach on one end and extra leverage on the other. Made from heat-treated steel, these wrenches will deliver years of consistent performance. Precisely sized ends are chamfered to slide easily into fastener, reducing wear on the wrench and damage to fastener head. The unique hinged storage case opens flat, making it easier to get wrenches in and out, and has high-visibility size markings for fast size selection. Features Precisely sized, chamfered, straight ends offer a snug fit and insert smoothly into fastener head, reducing wear. Black oxide finish protects against corrosion without added plating that could chip off under high-stress contact Hinged storage case opens flat, making it easier to get wrenches in and out