Rustproof & Durable: Constructed from high-hardness S2 alloy steel and CRV chrome-plated steel, the hex bit socket set surfaces feature sandblasting and mirror polishing. This design resists breakage and corrosion, ensuring years of reliable use. Metric & SAE Compatibility: This 32-piece extended hex socket set includes both metric and SAE sizes, covering a wide range of applications. It includes 2mm, 2.5mm, 3mm, 4mm, 5mm, 5.5mm, and 6mm with a 1/4-inch drive, 7mm, 8mm, 9mm, 10mm, and 12mm with a 3/8-inch drive, plus 14mm, 15mm, 17mm, and 19mm with a 1/2-inch driveall in one convenient kit. Easy Insertion: The allen socket set features a chamfered edge design with rounded triangular contact points to expand the contact area, ensuring smooth insertion while minimizing fastener wear. Precision-fit dimensions allow for easy alignment and secure threading, making screw insertion or removal effortless