Honeywell motion sensors are some of the most reliable motion detectors on the market and they come with mounting screws so that you can install them in your location. If you're not happy with just the mounting material that is included with these motion sensors and want more control of the positioning of your Honeywell motion detectors then the SMB-10 is what you'll want to buy.
The SMB-10 will allow you to mount the motion detector on the wall and, because of it's swivel base, you can position the motion detector at the optimum angle for your installation.