Shutter Release Button , VONOTO 3 Piece (Black,Red,Silver) 10mm Camera Metal Convace Shape 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 VONOTO 3 Piece (Black,Red,Silver) 10mm Metal Convace Shape 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 It's very comfortable to press on the button. The button surface and edge are very smooth. It's polished and enamel painted. The button is made of Metal. For Leica M rangefinder cameras include film M3 M6 MP, digital M8 M9 M9P etc.; SLR cameras like most Nikon, Canon,Hasselblad, Olympus, Minolta,Rolleiflex,FUJIX100 SLR cameras.