Rotates so that you get the exact amount of shading that you require from the sun - Locking clamp thread design so you can mount on an adapter or ring and still rotate the lens hood - Lightweight and portable - Protects your lens and camera from accidental damage - Easy to use: just screw it on the way a filter would. Rotate to the right to tighten, rotate to the left to detach - 3 Year Limited Warranty