It adopts double-ring knife net and double-layer blade design, which increases the amount of beard feeding by 50% compared with single-ring knife net, and can enter double beard at one time. A total of 15 blades in the inner and outer rings cooperate with each other to shave the beard quickly. The head of the electric shaver is equipped with an auxiliary knife with a thickness of 0.08mm on the outer ring main knife. The auxiliary knife is responsible for lifting the beard first, and the main knife cuts off the beard quickly, making it short and clean. Using the electrochemical machining technology in of high-quality equipment to process the blade and knife net, not only reduces the appearance of metal burrs, but also greatly improves the wear resistance of the tool. The three sets of blades have good flatness and a of fit with net. Snap the removal opening of the shaver head holder and remove the old head. Align the cutter head with the internal card position and down to fit to complete the installation. Product name: electric shaver head Colour:black Material:ABS+metal Package Contents: 2 x 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.