The BEAMMMK allows reflected beam detectors and reflectors to be mounted to either a vertical wall or the ceiling. The kit allows for additional alignment range in cases where the detector and reflector cannot be mounted within 10 degree of each other. The kit includes the hardware necessary to mount either a single transmitter/receiver unit or a single reflector. (To mount the transmitter/ receiver the surface mount kit, BEAMSMK, must also be used). If the transmitter/receiver and the reflector require additional alignment range two kits are required. The kit includes the following parts: Qty. Description 1 Ceiling mount bracket inside 1 Ceiling mount bracket outside 1 Wall mount bracket 1 “U” bracket 2 “L” bracket 1 Horizontal adjustment screw (ceiling) #10-24 × 2 1/4? 1 Horizontal adjustment screw (wall) #10-24 × 13/8? 2 Allen screw #10-24 × 1/2? 2 Allen screw #10-24 × 5/8? 2 Fender washer plastic 2 Fender washer metal 2 Washer plastic #10 2 Washer metal #10 2 Washer metal split-lock #10 2 Hex nut #10-24 1 Allen wrench