1、Using S2 alloy steel material, with high hardness, large torsion, strong and durable 2、The surface is of blue treatment, one-piece forged shape workmanship and long service life 3、The star‑shaped groove has a large contact area, which is convenient for operation and not easy to slip 4、The product has humanized inner wall buckle design, anti‑skid, which can make sure the connecting 5、Standard workmanship, suitable for using on tools such as wrenches and hand tool Item Type: Screwdriver Bit Socket Material: Alloy steel Purpose: Working on tools such as wrenches Length: Approx. 100mm / 3.9in Socket Tip Diameter: Approx. 13mm / 0.5in System: Metric Specification Model: T60 Interface Type: 1/2 drive port Interface Diameter: Approx. 22mm / 0.9in 1 x Screwdriver Bit Socket