RM2 Bosch Magnetic Rotating Mount with Fine Adjust RM2 Bosch Magnetic Rotating Mount with Fine Adjust features a microfine rotation adjustment knob for precise adjustment and secure lock of the working height to adjust the laser lines with a high degree of accuracy. RM2 Bosch Magnetic Rotating Mount with Fine Adjust features 360° rotation to position of the vertical line while keeping the unit centered on the plumb line and has strong magnets for quick positioning to metal surfaces as well as the slide-in attach mechanism which provides easy and quick attachment to Bosch lasers with compatible slide housing.