RM1 Bosch Magnetic Rotating Mount RM1 Bosch Magnetic Rotating Mount features a 360° rotating mount that rotates to the position of the vertical line while keeping the unit centered on the plumb line as well as strong magnets for quick positioning to metal surfaces and the slide-in attach mechanism provides easy and quick attachment of Bosch lasers with compatible slide housing. RM1 Bosch Magnetic Rotating Mount features a fastening slot for screwing the mount into position when no metal surfaces exist.