1. High-quality materials: The adjustable trimmer blade is made of Metal, which is - and wear-, and the high-quality materials can be used for a long time, and are and stronger, so they can work efficiently and provide better results; 2. How to replace: Adjust the blade to the front position, put the small top blade on the trimmer drive finger, and then put the large bottom blade on the small top blade, replace the screw and tighten it partially, making surethat the leftmost tooth of the top blade must be on the first small tooth of the bottom blade, after the blades are aligned, tighten the screw, turn the switch on and off several times, and then check the alignment of the blades; 3.Note: Any names mentioned are only used to show compatibility and are not trademarks. Functional and practical: These replacement blades are designed with 2 holes for easy use, they can be easily installed and are easy to maintain, in addition, the blades can provide uniform and clean haircut options; 4.Suitable for: Our replacement blades are a great tool to make your hair trimmer work like new, they are compatible with Series Color: As Shown Material: Metal Package Contents: 1 x Replacement head Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.