Neewer 11mm Diameter Silver Concave Metal Soft Shutter Release Button For Leica M Rangefinder Cameras M3 M6 MP M8 M9 M9P Nikon Canon Hasselblad Olympus Minolta Rolleiflex FUJIX100 SLR Cameras With Screw hole The button is made of Metal. Color: Silver Size: 11mm (diameter) It fits the cameras with screw hole on the shutter release button such as Leica M rangefinder cameras include film M3 M6 MP, digital M8 M9 M9P etc.; SLR cameras like most Nikon, Canon,Hasselblad, Olympus, Minolta,Rolleiflex,FUJIX1 SLR cameras.