Product Description: Advantages: 1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information 2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed.3.Used for tightening screws. Suitable for 1/4 inch (6.3mm) wrench interface,Suitable for hexagon sockets.4.Can be used in factories, car repair shops, home furnishings,Many sizes choice provide more convenience.5.Bits are made of S2 alloy steel for superior hardness and toughness.it is durable and have a long service life. Specifications:Material: S2 Alloy SteelType: HW3 HW4 HW5 HW6 HW7 HW8Color: Silver and Dark Brown Size: Approx. 4 x 1.2cm/1.57 x 0.47in(L x W)Wrench Size: 1/4in(6.3mm)Weight:198gAttentions: Model Type need to check the numbers on the head. Package include:2x HW3 Hex Bit Socket2x HW4 Hex Bit Socket2x HW5 Hex Bit Socket2x HW6 Hex Bit Socket2x HW7 Hex Bit Socket2x HW8 Hex Bit Socket