The mount fits almost all kinds of rifle scopes 37mm-45.5mm in outer diameter with simple eyepiece, knobs on the eyepiece, eyepiece with curved surface, or even eyepiece with small rings &grips.
Metal construction is durable enough for long time use and makes it usable to withstand the toughest weather conditions
Images more clear than smartphones - Cameras is always more professional in taking pictures. The images is more clear with a camera rather than a smartphone.
The surface to support the camera is covered with rubber. Strong PA plastic M5x10 screws (use 2 pieces or 4 pieces). never scratch your scope.