Foto&Tech’s soft release buttons are made of brass with concave surface, ensuring an easy, manual press at the top of your camera. It comes with 2 pieces of soft metal shutter release button. It’s easy to use. Simply screw the soft release button onto the threaded shutter release socket on your camera. After locking them in, you can enjoy clicking away with our soft, easy shutter release buttons. It also works as a stylish and elegant decoration for your camera. The contents also include 2 pieces of rubber O-rings, which serves as an adapter for other cameras, specifically compatible with Fujifilm X series camera. For other brand cameras that do not need the rubber O-ring, you can add a small piece Teflon Thread Seal Tape on the button screw. It will keep the shutter button stay still on the camera (not included in the package). Specifications:Concave surface diameter: 11mmThread size: ¼ inAvailable Colors: Comes in Red, Black, Gray, Silver, Gold, Dark Red, Orange, White, Green, Yellow.Compatible with Fujifilm X-T3 / X-T2 / X-T20 / X-T10 / X-PRO2 / X-PRO1 / X100F / X100T / X100S / X100 / X30 / X20 / X10 / X-E3 / X-E2S / X-E2 / X-E1 / STX-2. Compatible with Leica M10 / M9 / M8 / M7 / M6 / M3 / M2 / M1 / M-E / M-P / M9-P / M-A / M-Monochrom / M Type 240. Compatible with Canon New F-1 / F-1 / AE-1 (FD mount). Nikon: Df / M2 / F3. Sony: DSC-RX1R II / DSC-RX10 IV / DSC-RX10 III / DSC-RX10 II / DSC-RX10. Compatible with Minolta XD7 / Minolta SR-7 / Rollei (LM mount) / Olympus OM-1 / Hasselblad 503CW. Note: It also fits other cameras with a standard threaded shutter release socket which is designed by the camera manufacturers to accept a mechanical shutter release cable. Package includes: 2x 11mm (Diameter) Concave Surface Shutter Release Button (Rubber O-Ring Included)