Soft release button ensures a comfortable finger touch at the top of your camera. The soft release button is made by 925 silver, with brass core. It is because the silver is not strong enough to have threading. Just screw the soft release button into shutter release button’s threads and you will enjoy the soft and steady shutter release operation. In addition, it decorates your camera, which will make your camera look more stylish and elegant. After it is mounted on your camera, each time you capture a photo, you can feel its smooth soft surface. Two rubber o rings are included in every package, which are used to ensure a tight attachment.