1, Screw tooth design, simply twist the front opening of the camera lens to use. No need to install an additional adapter ring, intelligent centering function, patented design. perfectly match the lens size. The cover and square lid are all precision made of CNC lathe aluminum alloy. 2, Instructions for use: According to the diameter of the front opening of the lens, select a square metal light shield with the same diameter, twist it up to along the screw thread, and then twist it back and forth to align the square light shield horizontally with the center of the lens and camera. When disassembling, simply twist the thread normally to remove it. 3, Advantages: a. traditional screw locking and adjusting or screw fixing locking and returning designs. We adopt the latest intelligent centering function, patented design, and super convenient to use. b. Perfectly matching the size of the lens. The cover and square cover are all precision made of CNC lathe aluminum alloy. The inner wall of the lid is coated with black velvet, and the inner wall of the cover is coated with black matte paint. c. The lens cover that can be pinched in the middle can be used. Color: Black Material: Metal Package Contents: 1 x Lens Cap 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.