VKO soft release buttons ensures a comfortable finger touch at the top of your camera. The soft release buttons are made of brass. This series soft release buttons are divided into two different shapes- concave surface and convex surface. 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. Additionally, the two kinds of release buttons with rubber ring.The rubber ring which is mainly used for Fujifilm X series cameras to ensure a tight attachment, while not for RX1 series cameras. Compatibility: Fujifilm X-PRO2 / X-E2S / X10 / X20 / X30 / X-T2/ X100T / X100 / X100S / X-E1 / X-E2 / X-E3 XPRO-1 / SXT-2 / X-T10 Leica M1 / M2 / M3 / M6 / M7 / M8 / M9 / M-E / M-P / M9-P / M-A / M-Monochrom / M Type 240 Canon F-1 / New F-1 / AE-1 (FD mount) Nikon Df / M2 / F3 Sony RX1R II  / RX10 II Minolta XD7 / Minolta SR-7 / Rollei (LM mount) / Olympus OM-1 PEN-F / Hassellad 503CW Package: 1pcs 11mm(diameter)concave surface and 1pcs 10mm(diameter)convex surface red metal shutter release button with 4pcs rubber ring, other accessories not included.